Foteco All Emulsions by Aentep Trading Ltd.

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1569 1. Description 100% solvent resistant screen emulsion with separate Diazo powder sensitizer Normal exposure time; very easy to remove Touch ups are practically avoided; wash-out is fast and easy and does not need a high pressure device Light purple in color for good transparency

info.fotec@saati.com

2. Applications Advantages 36% solids content before sensitizing High viscosity (relatively thick) For all inks containing solvents alone and no water Even aggressive inks do not harden the stencil during printing so that decoating remains easy regardless of the type of ink. Because of the mat surface static problems can be avoided 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 43 T monofilament 43 T monofilament 43 T monofilament 43 T monofilament 43 T monofilament 43 T monofilament 43 T monofilament

Coating 1/1, 2 face coats 2/2 2/3 2/5 1/2 2/3 2/3, 2 face coats

Stencil Thickness below mesh 14 µm 20 µm 24 µm 35 µm 10 µm 16 µm 18 µm

Because of the high viscosity it is recommended to let the sensitized emulsion de-gas during a few hours before coating. This prevents air bubbles in the stencil which could cause pinholes FOTECOAT 1569 is ideal for machine coating. If a lower viscosity is wanted, additional water can be added without changing the exposure time. 4. Stencil Quality

The resolution is good and reaches approximately 60 microns The definition is good After the wash-out the stencil is relatively soft. Do not use high pressure wash-out device The stencil is sensitive to humidity Chemical hardening is not recommended For stencil cleaning during printing it is necessary to use a solvent that does not contain water; otherwise the stencil becomes soft or sticky

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1569 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4-6 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

4 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Time (seconds)

Coating

Type of Mesh

1/2

120 T White

1/2

120 T Dyed

110

2/3

120 T White

100

2/3

120 T Dyed

160

2/3, 2 face coats

120 T Dyed

200

2/3

77 T Dyed

240

2/2

43 T White

260

7. Stencil removal All commercial decoaters can be used. A high pressure gun is recommended. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder Ghost pictures can be removed with FOTECHEM 2085 (blend of emulsifying solvents) followed by FOTECHEM 2080 (high alkaline paste).

SAATI S.p.A. These Technical Informations are published without warranty. The results shown in these Technical Informations are based on laboratory testing. The supplier declines any responsibility for incorrect use of these products which are manufactured and sold for industrial use only.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1570 1. Description Fast, fully solvent resistant screen emulsion with separate diazo powder sensitizer Easy to remove Blue in color for good transparency

info.fotec@saati.com

2. Applications Advantages 33% solids content before sensitizing High viscosity (relatively thick) For all inks containing solvents alone and no water 40% exposure time compared to standard Diazo emulsions Remains easy to decoat even if aggressive inks have been used during the printing process Humidity resistant; does not get “sticky“ in high humidity climate (summer months) The mat stencil surface together with a unique composition help to avoid electrostatic problems

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 43 T monofilament 43 T monofilament 77 T monofilament 77 T monofilament 120 T monofilament 120 T monofilament 120 T monofilament

Coating 1/1, 2 face coats 2/2 2/3 2/5 1/2 2/3 2/3, 2 face coats

Stencil Thickness below mesh 12 µm 16 µm 20 µm 30 µm 8 µm 12 µm 14 µm

FOTECOAT 1570 is very appropriate for large size stencils because of the short exposure time; it is ideal for machine coating. It can be used successfully on white and dyed mesh, or V2A; coarse meshes are suitable. 4. Stencil Quality The resolution is good and reaches approximately 60 microns The definition is excellent After the wash-out the stencil is relatively soft. Use high pressure washout device with low pressure, enough distance and care A chemical hardening is not recommended

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1570 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4-6 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

4 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Coating

Type of Mesh

Time (seconds)

1/2

120 T White

1/2

120 T Dyed

2/3

120 T White

2/3

120 T Dyed

2/3, 2 face coats

120 T Dyed

2/3

77 T Dyed

2/2

43 T White

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1636 1. Description Fast, water resistant screen emulsion with separate Diazo powder sensitizer for textile screen printing Can be decoated with a high pressure water device Light purple with good see-through 2. Applications Advantages

info.fotec@saati.com

40% solids content before sensitizing Rather low viscosity (relatively thin) Suitable for all inks containing water only and no solvents Simple to use with good resolution and high definition

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 43 T monofilament 43 T monofilament 77 T monofilament 77 T monofilament 120 T monofilament 120 T monofilament

Coating 1/1, 2 face coats 2/2 2/3 1/2 2/3 2/3, 2 face coats

Stencil Thickness below mesh 10 µm 14 µm 16 µm 6 µm 11 µm 13 µm

It is recommended to let the sensitized emulsion degas during a few hours after sensitizing. Coat slowly with enough trough pressure against the mesh. This prevents air bubbles which could cause pinholes. The emulsion can be used for coating on an automatic coating machine Coating again after an intermediate drying cycle improves the flatness of a stencil profile and does not increase substantially the stencil thickness. However the printing shoulders will keep contact with the substrate during the printing process; an improved printing result is achieved. For negative image printing the stencil thickness should be increased by 3-4 μm compared with positive printing. For very long runs, apply one additional coat, after drying, on the squeegee side to embed the mesh; increase exposure by 20 - 30%. If the emulsion is too thin (coarse mesh) use ½ bottle of water only to dissolve the Diazo powder. Shake thoroughly before mixing into the emulsion. 4. Stencil Quality

The resolution is excellent and reaches approximately 60 microns The definition is very good After the wash-out the stencil is hard. It is possible to use a high pressure device for the washout A chemical hardening by FOTECHEM 2110 or 2100 is possible. The water resistance and the wearing characteristics will improve. In such a case the stencil can no longer be decoated

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1636 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

1 week

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Coating

Type of Mesh

Time (seconds)

1/2

120 T White

1/2

120 T Dyed

2/3

120 T White

2/3

120 T Dyed

100

2/3, 2 face coats

120 T Dyed

120

2/3

77 T Dyed

150

2/2

43 T White

170

7. Stencil removal All commercial decoaters can be used. A high pressure gun is recommended. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder Because of the hardness of the stencil the decoating medium should stand for 10-15 minutes on the stencil before it is washed-out. Under difficult conditions the removal operation has to be repeated. If decoating equipment is used a higher concentrated solution is necessary and a degreasing cycle before decoating is recommended. Ghost pictures can be removed with FOTECHEM 2085 (blend of emulsifying solvents) followed by FOTECHEM 2080 (high alkaline paste).

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1669 1. Description Water resistant screen emulsion with separate Diazo powder sensitizer Can be decoated with a high pressure water device Purple with good contrast 2. Applications Advantages

info.fotec@saati.com

36% solids content before sensitizing. Rather high viscosity (relatively thick) Suitable for all inks containing water only and no solvents Simple to use with good resolution and high definition

Coating 1/1, 2 face coats 2/2 2/3 2/5 1/2 2/3 2/3, 2 face coats

Stencil Thickness below mesh 14 µm 20 µm 24 µm 35 µm 10 µm 16 µm 18 µm

It is recommended to let the sensitized emulsion degas during a few hours after sensitizing. This prevents air bubbles which could cause pinholes. The emulsion can be used for coating on an automatic coating machine If the emulsion is too thick, additional water can be added without changing the exposure time Coating again after an intermediate drying cycle improves the flatness of a stencil profile and does not increase substantially the stencil thickness. However the printing shoulders will keep contact with the substrate during the printing process; an improved printing result is achieved For negative image printing the stencil thickness should be increased by 3-4 μm compared with positive printing 4. Stencil Quality The resolution is excellent and reaches approximately 60 microns The definition is very good After the wash-out the stencil is hard. It is possible to use a high pressure device for the wash-out A chemical hardening by FOTECHEM 2110 is possible. The water resistance and the wearing characteristics will improve. In such a case the stencil can no longer be decoated If better transparency is desired, FOTECOAT 1664 can be used. This emulsion is undyed, white, and can be used as such or be mixed with FOTECOAT 1669 to reach the needed transparency

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1669 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

1 week

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Time (seconds)

Coating

Type of Mesh

1/2

120 T White

1/2

120 T Dyed

140

2/3

120 T White

100

2/3

120 T Dyed

160

2/3, 2 face coats

120 T Dyed

200

2/3

77 T Dyed

240

2/2

43 T White

260

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1711 1. Description Diazo screen emulsion with separate Diazo-powder for solvent based inks Light purple after exposure with excellent transparency Ideal for humid and warm climates

info.fotec@saati.com

2. Applications Advantages On polyester 120T a stencil thickness below the mesh of approx. 10 microns can be reached by 3 coats from the printing side and 5 coats from the squeegee side, wet on wet. 8 microns are achieved by the 2/3 coating technique The coating technique with intermediate drying cycles can be used. The stencil maker does not have to change his coating technique; in many cases however one coating stroke can be saved Very high resistance against solvent based inks and UV-curing inks Nevertheless FOTECOAT 1711 is easy to decoat. High pressure necessary for aggressive inks Excellent adhesion and anchorage to the mesh; a strong water spray can be used for wash-out Partial areas of the finished stencil can be covered with tape or water soluble screen filler for multi-color work with one stencil. The screen filler can afterwards be washed out with water without damaging the stencil 3. Printing advantages Very high resolution with excellent definition both for positive and negative printing. The flow-out of the emulsion after coating and during the drying cycle is extremely good so that relatively thin stencils below the mesh can be coated, creating at the same time a flat-bottomed stencil which is hardly influenced by the mesh structure. 8-10 microns are sufficient in combination with polyester 120T for positive printing; 12-14 microns for negative printing

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1711 4. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4-6 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

2-3 weeks

5. technical indications 27% Unsensitized

Content of Solids

Approx. 16’000 cps. This high viscosity is ideal for polyester and steel mesh. FOTECOAT 1711 can be coated on very fine fabrics and on coarse meshes by adapting the coating and drying technique to the mesh type. For meshes over 150T the screen emulsion can be diluted with water.

Viscosity

Approx. 50% of a normal Diazo screen emulsion

Exposure Time

Light purple, with very good transparency

info.fotec@saati.com

Stencil Color After Exposure

50 µm positive / 70 µm negative

Resolution

Very good. The printing result depends on the mesh number, the mesh color, the coating and drying technique and the final dry stencil thickness below the mesh.

Edge Definition

Very good; also against aggressive cleaning solvents

Solvent Resistance

Reasonably good; screen filler can be washed out with water.

Water Resistance

Minimum

Sensitivity to Humidity

Easy; possible without high pressure unit. A degreasing cycle before decoating helps to prevent ghost pictures. Use FOTECHEM 2005 paste or 2044 powder or 2042 liquid concentrate

Decoating

Can be removed with FOTECHEM 2085 (blend of emulsifying solvents) followed by FOTECHEM 2080 (high alkaline paste).

Stencil/Ink Residue caused by inadequate cleaning/decoating

Excellent and without problems; the screen emulsion can be diluted with water if the viscosity is too high.

Compatibility with Machine Coating

6. exposure times 5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Mesh 120 T white

Mesh 120 T Dyed

Mesh 90 T Dyed

Mesh 77 T Dyed

Mesh 325 Steel

Coating

thickness

time (sec)

thickness

time (sec)

thickness

time (sec)

thickness

time (sec)

thickness

time (sec)

1/2

1 µm

2/3

8 µm

9 µm

12 µm

100

6 µm

3/5

10 µm

11 µm

110

14 µm

130

8 µm

100

2/3, 2 face coats

12 µm

2 µm

110

13 µm

130

16 µm

160

12 µm

140

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1771 1. Description Hard and fast screen emulsion with separate Diazo powder sensitizer for most solvent based inks Blue color after exposure with high contrast Ideal for humid and warm climates No warning on the label 2. Applications Advantages

info.fotec@saati.com

Rather thin emulsion for easy coating Ideal for fine mesh numbers Excellent resolution and definition Excellent adhesion and anchorage to the mesh; a strong water or a mild high pressure spray can be used for wash-out

3. Coating Technique After sensitizing, the emulsion must stand overnight for complete de-gasing. Coat slowly with strong pressure against the mesh: this helps to avoid pinholes Machine coating is possible To reach a flatter stencil profile, 1 or 2 additional coats on the print side can be applied after intermediary drying To reinforce the stencil, an additional coat on the squeegee side is recommended. Increase the exposure time by 20 - 30%

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1771 4. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4-6 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

4 weeks

5. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Coating

Mesh

Time in Seconds

1/2

120 T white

1/2

120 T Dyed

2/3

120 T white

2/3

120 T Dyed

1/2

77 T white

1/2

77 T Dyed

6. Stencil removal The longer the exposure, the easier the removal. FOTECOAT 1771 however undergoes a hardening by certain ink solvents. Therefore and depending on the ink used and the washing solvents, the decoating can be relatively easy or very difficult. A high pressure spray is recommended. Remove ink first with adequate solvent. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste; FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating; FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating; FOTECHEM 2044 powder (use 5 litres of water to 100 grams of powder) Let stand for 10-15 minutes before hosing off. In automatic decoating equipment a high concentration of remover should be used and a degreasing cycle before the removal. To clean the mesh from ghost pictures, use FOTECHEM 2085 (solvent) coupled with FOTECHEM 2080 paste (high alkaline content).

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1772 1. Description High definition screen emulsion with separate Diazo powder sensitizer for most solvent based inks Available undyed with separate purple dye or as purple emulsion Available for extra short exposure (with C33 Diazo powder) or for standard exposure with C8J sensitizer. Denomination short version: FOTECOAT 1772 FAST Biologically sound, qualified as harmless chemical. No warning symbol on the label

info.fotec@saati.com

2. Applications Advantages Medium viscosity for most polyester and steel mesh numbers Ideal for extra high definition and excellent wet hardness

3. Coating technique and stencil build-up (coating trough .75 mm R) After sensitizing, the emulsion must stand overnight for complete degassing Manual or machine coating is possible To reach a flatter stencil profile (lower Rz-value), 1 or 2 additional coats on the print side can be applied after intermediary drying To reinforce the stencil, an additional coat on the squeegee side is recommended. Increase the exposure time by 20 - 30% in such a case

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1772 4. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized and stored at 20ºC (pot life)

4-6 weeks

Pre-coated screens in total darkness at 20ºC

2-3 weeks

5. exposure times A step wedge is recommended to establish the correct exposure time with the type of emulsion and the type of sensitizer

info.fotec@saati.com

The quantity of separate dye added to the emulsion by the operator influences slightly the exposure time The FOTECOAT 1772 FAST version (purple) sensitized with C33 Diazo is approximately 30% faster than the standard version FOTECOAT 1772 sensitized with C8J sensitizer 6. Stencil removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 or 2089 can be used to remove all ink and emulsion residues; jet wash is necessary 7. Packaging Only 4,5 kg sets are available. 6 sets in 1 export case.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1915 WR 1. Description Same as 1015 WR, but Diazo can be added directly to emulsion, without water: DIR-AD Fast, dual cure polymer type textile printing screen process emulsion with separate Diazo sensitizer powder, for aqueous ink systems Light purple colour with excellent see-through The ready-made stencil can be posthardened by light to increase the mechanical and the solvent resistance Very short exposure time Ecologically sound

info.fotec@saati.com

2. Applications Advantages 41% solids content Medium viscosity, appropriate for meshes between 45 T and 120 T (lower viscosity than FOTECOAT 1065 and a higher viscosity than FOTECOAT 1636) FOTECOAT 1915 WR is a water resistant emulsion that can be printed with most inks containing water and little solvents A longer exposure renders the stencil more resistant against abrasion and therefore allows to print longer runs FOTECOAT 1915 WR can be decoated If a permanent stencil for all inks is desired a longer post-hardening by light or a chemical treatment with FOTECHEM 2110 or 2100 Hardener can be used. In such a case the stencil can no longer be decoated 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 43 T multifilament 43 T monofilament 77 T monofilament 120 T monofilament 120 T monofilament

Coating 1/2 1/1 1/2 1/1 2/3

Stencil Thickness below mesh 20 µm 20 µm 15 µm 4 µm 14 µm

FOTECOAT 1915 WR is ideal for machine coating. If necessary the emulsion can be diluted with water to reach a lower viscosity. 4. Stencil Quality The definition is excellent. The high solids content allows to reach a flat stencil surface combined with excellent mesh bridging. The resolution is good.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1915 WR 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

1-2 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

3 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Coating

Type of Mesh

Time (seconds)

1/2

43 T Multifilament White

100

1/1

43 T Monoifilament White

1/2

43 T Multifilament White

105

1/2

77 T Multifilament White

1/2

77 T Multifilament White

135

1/1

120 T Multifilament White

1/1

120 T Multifilament White

1/2

120 T Multifilament White

1/2

120 T Multifilament White

2/3

120 T Multifilament White

2/3

120 T Multifilament White

105

7. post exposure Once the stencil is washed-out and dried it can be exposed again under the sun, day light fluorescent tubes or with the standard exposure lamp; it is recommended to make the post-exposure without the vacuum frame so that no glass between the lamp and the stencil interferes with light absorption. 8. Stencil removal All commercial decoaters can be used. A high pressure gun is recommended. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1920 K Ceramic 1. Description Fast, duo-cure polymer type textile printing screen process emulsion with separate Diazo sensitizer powder, for aqueous ink systems Light blue color with excellent see-through The ready-made stencil can be posthardened by light to increase the mechanical and the solvent resistance Very short exposure time Ecologically sound

info.fotec@saati.com

2. Applications Advantages 44% solids content before sensitizing. Low viscosity, appropriate for meshes between 43-80 and 120-34 (lower viscosity than FOTECOAT 1065 and a higher viscosity than FOTECOAT 1636) FOTECOAT 1920 K is a water resistant emulsion that can be printed with most inks containing water and little solvents A longer exposure renders the stencil more resistant against abrasion and therefore allows to print longer runs FOTECOAT 1920 K can be decoated If a permanent stencil for all inks is desired a longer post-hardening by light or a chemical treatment with FOTECHEM 2110 or 2100 Hardener can be used. In such a case the stencil can no longer be decoated 3. Coating It is recommended to let degas the emulsion after sensitizing during a few hours. Mesh

Coating

EOM

43-80

1/1

20 µm 15 µm

77-55

1/2

120-34

1/1

6 µm

120-34

1/2

10 µm

FOTECOAT 1920 K is ideal for machine coating. If necessary the emulsion can be diluted with water. 4. stencil quality The definition is excellent. The high solids content allows to reach a flat stencil surface combined with excellent mesh bridging The resolution is good

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1920 K Ceramic 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

2-3 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

3 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; iron charged high pressure burner at 100 hours burning time Time in Seconds

Coating

Mesh

1/1

43-80 white

1/2

43-80 white

120

1/1

43-80 yellow

135

1/2

43-80 yellow

180

1/1

77-55 white

1/2

77-55 white

1/1

120-34 white

1/2

120-34 white

1/1

120-34 yellow

1/2

120-34 yellow

7. post-exposure Once the stencil is washed-out and dried it can be exposed again under the sun, day light fluorescent tubes or with the standard exposure lamp; it is recommended to make the post-exposure without the vacuum frame so that no glass between the lamp and the stencil interferes with light absorption. 8. Removal Only possible with high pressure gun A higher concentrated remover than usual has to be used. Ideal are FOTECHEM 2004 liquid or FOTECHEM 2005 paste For machine decoating the concentration of the remover liquid has to be increased and the speed of the machine be reduced to a minimum A post-exposure makes the stencil removal easier

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1930 M

Direct ceramic printing on tiles in single, double and third fire

info.fotec@saati.com

1. Description Dual-cure Diazo/polymer screen process emulsion for printing on ceramic substrates and for ceramic decalcomanias Suitable for most ceramic inks The sensitizer can be mixed directly into the FOTECOAT 1930 M emulsion (dissolving in water is not necessary) The emulsion can be post-exposed to reach complete thru-curing Possibility to harden chemically with FOTECHEM 2100 to produce permanent stencils Blue, high contrast colour to facilitate touch-ups FOTECOAT 1930 M is already light sensitive; the following sensitising with the Diazo powder should be done under yellow light only FOTECOAT 1930 M is phthalate-free 2. Applications Advantages After sensitizing approx. 46% solids content Medium viscosity, suitable for meshes from 43-80 to 120-34 threads per linear cm and for manual or machine coating The Diazo sensitise is supplied in a separate, airtight, humidity repellent and heatinsolating sachet. It can be added directly to FOTECOAT 1930 M; it dissolves quickly and under light stirring. Before coating let the emulsion degas High resolution with excellent mesh bridging Can be decoated with the usual chemicals as long as a catalyser has not hardened the stencil If necessary, FOTECOAT 1930 M can be diluted with a small amount of water 3. Coating It is recommended to let degas the emulsion after sensitizing during a few hours. Mesh

Coating

EOM

43-80

1/1

25 µm 16 µm

77-55

1/2

120-34

1/1

6 µm

120-34

1/2

10 µm

4. stencil quality

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1930 M

Direct ceramic printing on tiles in single, double and third fire

5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 10-15ºC (pot life)

2 months

Sensitized, stored at 20ºC (pot life)

1 month

Pre-coated screens in total darkness at 20ºC

3 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; iron charged high pressure burner at 100 hours burning time Coating

Mesh

Time in Seconds

1/1

43-80 white

1/2

43-80 white

1/1

43-80 yellow

100

1/2

43-80 yellow

130

1/1

77-55 white

1/2

77-55 white

1/1

120-34 white

1/2

120-34 white

1/1

120-34 yellow

1/2

120-34 yellow

7. removal

Standard stencil decoating chemicals can be used like FOTECHEM 2004 or 2005 The decoating chemicals should never dry on the stencil Make sure the screen filler is dissolved first with water before decoating starts Whenever possible degrease before the decoater is being applied; this facilitates decoating and helps to prevent ghost pictures. FOTOCHEM 2033 is an ideal degreaser concentrate For the regeneration of the decoated mesh FOTECHEM 2080/2085 can be used to remove all ink and emulsion residues; jet wash is necessary Diazo stains can be bleached out after decoating with FOTECHEM 2089 Important: A fully exposed stencil, with full thru curing, or a postexposure, facilitates the stencil removal

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1970

Sensitising with the new FOTECO DIR-AD system Economic, fool-proof, all purpose screen emulsion

1. Description

info.fotec@saati.com

Dual-cure, photopolymer screen emulsion Ideal for most ink systems Can be sensitized by direct addition of the sensitizer powder The sensitizer is supplied in air-tight, insulated sachets for long shelf-life Can be post-exposed to improve the through-curing Blue colour with high contrast Excellent adhesion to all meshes After sensitizing 33% solids content The exposure time is short Environmentally safe 2. Coating Ideal viscosity for coating on most mesh numbers Coatable wet in wet or with intermediate drying cycle Can be used for manual or hand-coating 3. stencil quality Resolution on polyester monofilament 120-34 yellow: 50 μm; excellent mesh bridging To lower the Rz-value 1-2 additional coats can be added after an intermediate drying cycle. After this the stencil should be dried with print-side upwards 4. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 20ºC (pot life)

3-4 weeks

Pre-coated screens in total darkness at 20ºC, 60% RF

2 months

5. exposure times Dry the stencil completely before exposure and never use heat over 40°C. 5 kW metal halide lamp at 100 cm distance; iron charged high pressure burner at 100 hours burning time Mesh / Coating

EOM

Time in Seconds

PE monofilament 120-34 yellow 2P/3S

11 µm

PE monofilament 120-34 yellow 1P/2S

7 µm

PE monofilament 43-80 white 1P/1S

12 µm

120

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1970

Sensitising with the new FOTECO DIR-AD system Economic, fool-proof, all purpose screen emulsion

6. removal

info.fotec@saati.com

Standard stencil decoating chemicals can be used such as FOTECHEM 2044 (powder), 2005 (paste), 2042 (concentrated liquid), 2004 (liquid ready-to-use) The decoating chemical should never dry on the stencil Whenever possible degrease before the decoating; this facilitates decoating and helps to prevent ghost-pictures Important: a fully exposed stencil, with complete through-curing, or a post-exposure, renders the stencil removal faster and easier To remove Diazo stains use FOTECHEM 2089 To eliminate haze, residues, ghost pictures: FOTECHEM 2080 paste together with FOTECHEM 2085 Regenerator Liquid is recommended

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1975

Sensitizing with the new FOTECO DIR-AD system. “Universal“ screen emulsion

info.fotec@saati.com

1. Description Dual-cure, photopolymer screen emulsion Ideal for most ink systems including aqueous UV-inks Can be sensitized by direct addition of the sensitizer powder The sensitizer is supplied in air-tight, insulated sachets for long shelf-life Can be post-exposed to improve the through curing. The chemical hardening should be avoided as the stencil might have tendency to get brittle Dark aqua-marine colour with high contrast Excellent adhesion to all meshes After sensitizing 38% solids content The exposure time is relatively long to achieve the best possible resolution coupled with an extended exposure latitude Environmentally safe 2. Coating Ideal viscosity for coating on most mesh numbers Coatable wet in wet or with intermediate drying cycle Can be used for manual- or hand-coating 3. stencil quality Resolution on polyester monofilament 120-34 yellow: 35 μ; excellent mesh bridging To lower the Rz-value 1-2 additional coats can be added after an intermediate drying cycle. After the intermediate drying the stencil should be dried with print-side upwards 4. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 20ºC (pot life)

3-4 weeks

Pre-coated screens in total darkness at 20ºC, 60% RF

2 months

EOM

Time in Seconds

PE monofilament 120-34 yellow 2P/3S

17 µm

130

PE monofilament 120-34 yellow 1P/2S

12 µm

105

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1975

Sensitizing with the new FOTECO DIR-AD system. “Universal“ screen emulsion

6. removal

info.fotec@saati.com

Standard stencil decoating chemicals can be used such as FOTECHEM 2044 (powder), 2005 (paste), 2048 (concentrated liquid), 2004 (liquid ready-to-use) The decoating chemical should never dry on the stencil Whenever possible degrease before the decoating; this facilitates decoating and helps to prevent ghost-pictures Important: a fully exposed stencil, with complete through-curing, or a post-exposure, renders the stencil removal faster and easier

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1432

Ready-to-use screen emulsion for the textile screen printing with plastisol and aqueous inks. Designed for CtS or projection exposure.

1. Description This very fast, presensitized polymer screen emulsion is extra designed for CtS or projection equipment Exposes 30x faster than Diazo or dual cure emulsions Processing under yellow light is highly recommended because of the high light sensitivity Superior water resistance Solids content 36% FOTECOAT 1432 WR is purple, the stencils allow good see-through

info.fotec@saati.com

2. Applications Advantages Can be coated on all types of meshes Medium resolution with good stencil edge sharpness Excellent print resistance Can be decoated very easy with the usual products The chemical hardening for the production of a more resistant or permanent stencil is possible with FOTECHEM 2100, 2110 or 2130 3. Coating technique Manually the ready to use emulsion can be coated 1/1 or 1/2 wet in wet. On coarse meshes 1/1 coating is possible. The viscosity is ideal for machine coating. To produce a flatter stencil profile with a lower Rz-value (to improve print edge quality) additional coats can be added after an intermediate drying cycle. After each such cycle the stencil thickness increases by 1-2 microns and the Rz-value becomes lower. After coating pour the emulsion from the coating trough into an empty can so that it can degas; this way air bubbles can be avoided in the stencil which results in less pin-holing 4. Stencil Quality Excellent mesh bridging. This causes an excellent stencil edge together with medium resolution at short exposure times. A perfect stencil can be achieved on dyed mesh if the correct coating and drying technique is applied. In combination with white mesh the resolution suffers slightly The cleaning of plastisoles should be done with white spirit and not with stronger solvents.

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1432

Ready-to-use screen emulsion for the textile screen printing with plastisol and aqueous inks. Designed for CtS or projection exposure.

5. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct light. Protect also against freezing. Condition

Service Life

Unsensitized, 18-25ºC storage

2 years

Pre-coated screens in total darkness at 20ºC

2-3 weeks

info.fotec@saati.com

6. exposure times Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time. If DLE exposure will be used, perform an exposure test with a 21-step Sensitivity Guide to determine correct exposure speed. The 21-step Sensitivity Guide should be taped directly to the surface of the emulsion in an area that will be fully exposed. 1432 WR stencils should hold a solid step 5 after thorough developing to guarantee proper resistance during printing, maintaining excellent resolution 7. Stencil removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 or 2089 can be used to remove all ink and emulsion residues; jet wash is necessary

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1456

Specially designed for use with DLE technology (Direct Light Exposure) for Computer to Screen Technology

1. Description Extremely high resolution pure photopolymer emulsion It’s exposure speed makes FOTECOAT 1456 ideal for the “very large format” in advertising and general graphic Red colour Low viscosity

info.fotec@saati.com

2. Applications Advantages Ready to use 33% solids for high printing quality Resistant to UV-cured, water-based UV and solvent-based ink for the graphic market Exposes 20 times faster than Diazo or dual-cure emulsions Easy to reclaim

3. Coating technique and stencil build-up (coating trough .75 mm R) 1456 can be coated by hand or with the use of an automatic coating machine Apply one or two coats to the substrate side of the screen, followed by one or two coats on the squeegee side. For a thicker stencil, apply additional coats to the squeegee side prior to drying To reach a flatter stencil surface with a lower Rz-value and to improve edge sharpness of print, 1 or 2 additional coats can be applied after the intermediary drying cycle. Stencil thickness will increase by 1-2 microns and the Rz-value goes down

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1456

Specially designed for use with DLE technology (Direct Light Exposure) for Computer to Screen Technology

4. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct light. Protect also against freezing. Condition

Service Life

Unsensitized, 18-25ºC storage

2 years

Pre-coated screens in total darkness at 20ºC

2-3 weeks

info.fotec@saati.com

5. exposure times Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time. If DLE exposure will be used, perform an exposure test with a 21-step Sensitivity Guide to determine correct exposure speed. The 21-step Sensitivity Guide should be taped directly to the surface of the emulsion in an area that will be fully exposed. 1456 stencils should hold a solid step 5 after thorough developing to guarantee proper resistance during printing, maintaining excellent resolution After washing out a post exposure is possible. Post expose with daylight or exposure UV lamp to produce a more water-resistance stencil 6. Stencil removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 or 2089 can be used to remove all ink and emulsion residues; jet wash is necessary

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1457

Specially designed for use with DLE technology – very easy to decoat

1. Description Extremely high resolution pure photopolymer emulsion It’s exposure speed makes 1457 DIREX ideal for the “very large format” in advertising and general graphic Easy to decoat Red colour Medium viscosity

info.fotec@saati.com

2. Applications Advantages Ready to use Very easy to reclaim – no residues left on screen! 30% solids for high printing quality Resistant to UV-cured, water-based UV and solvent-based ink for the graphic market Exposes 20 times faster than Diazo or dual-cure emulsions 3. Coating technique and stencil build-up (coating trough .75 mm R) 1457 can be coated by hand or with the use of an automatic coating machine Apply one or two coats to the substrate side of the screen, followed by one or two coats on the squeegee side. For a thicker stencil, apply additional coats to the squeegee side prior to drying To reach a flatter stencil surface with a lower Rz-value and to improve edge sharpness of print, 1 or 2 additional coats can be applied after the intermediary drying cycle. Stencil thickness will increase by 1-2 microns and the Rz-value goes down

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1457

Specially designed for use with DLE technology – very easy to decoat

4. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct light. Protect also against freezing. Condition

Service Life

Unsensitized, 18-25ºC storage

2 years

Pre-coated screens in total darkness at 20ºC

2-3 weeks

info.fotec@saati.com

5. exposure times 1457 has very high sensitivity to UV light and is suitable for use with DLE machines. Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time. If DLE exposure will be used, perform an exposure test with a 21-step Sensitivity Guide to determine correct exposure speed. The 21-step Sensitivity Guide should be taped directly to the surface of the emulsion in an area that will be fully exposed. 1457 stencils should hold a solid step 5 after thorough developing to guarantee proper resistance during printing, maintaining excellent resolution After washing out a post exposure is possible. Post expose with daylight or exposure UV lamp to produce a more water-resistance stencil 6. Stencil removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 or 2089 can be used to remove all ink and emulsion residues; jet wash is necessary

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1468

Specially designed for use with DLE technology

1. Description Extremely high resolution and definition double-cure pure photopolymer emulsion Resistant to UV-cured, water-based UV-cured and solvent-based ink for the glass market Its exposure speed makes 1468 DIREX ideal for the “very large format” Blue colour Low viscosity

info.fotec@saati.com

2. Applications Advantages Ready to use, ca. 35% solids Exposes 20 times faster than Diazo or dualcure emulsions - Handle under yellow safe light! Can be coated wet on wet without intermediate drying Easy to reclaim

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 77-55 polyester monofilament 90-48 polyester monofilament 120-34 polyester monofilament

Coating 1/1 2/3 2/3

Stencil Thickness below mesh 8 µm 10 µm 13 µm

To reach a flatter stencil surface and to lower the Rz-value to improve edge sharpness of the print, 1 or 2 additional coats can be applied after the intermediary drying cycle. Stencil thickness will increase by 1-2 microns and the Rz-value goes down. 4. stencil quality Perfect mesh bridging is possible. After wash-out the stencil is very hard and has low swell characteristics.

FOTECO

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TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1468

Specially designed for use with DLE technology

5. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct light. Protect also against freezing. Condition

Service Life

Unsensitized, 18-25ºC storage

2 years

Pre-coated screens in total darkness at 20ºC

2-3 weeks

info.fotec@saati.com

6. exposure times 1468 has very high sensitivity to UV light and is suitable for use with DLE machines Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time If DLE exposure will be used, perform an exposure test with a 21-step Sensitivity Guide to determine correct exposure speed. The 21-step Sensitivity Guide should be taped directly to the surface of the emulsion in an area that will be fully exposed. 1468 stencils should hold a solid step 5 after thorough developing to guarantee proper resistance during printing, maintaining excellent resolution After washing out a post exposure is possible. Post expose with daylight or exposure UV lamp to produce a more water-resistance stencil 7. Stencil removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 or 2089 can be used to remove all ink and emulsion residues; jet wash is necessary

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1833

For garment printing Designed for use with DLE (Direct Light Exposure for CtS)

1. Description Ready to use emulsion Blue, 45% solid content Resistant to plastisol, water based, sublimation and discharge inks Outstanding abrasion and humidity resistance Excellent print definition on any mesh 2. Applications Advantages

info.fotec@saati.com

Resistant to discharge inks without adding Diazo or hardening with catalyst Exposes 8 times faster than Diazo or dual-cure emulsions Can be coated wet on wet without intermediate drying

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 120-34

Coating 1/1

Stencil Thickness below mesh 6-7 µm

4. Exposure 1833 BLUE has high sensitivity to UV light and is suitable for use with DLE machines Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time Perform an exposure test a exposure calculator (21 Step Sensitivity Guide) to determinate correct exposure time for a complete cure Ensure that all surfaces (emulsion, film and glass) are free of dust to minimize pinholes Contact the emulsion side of the positive with the substrate side of the screen and secure in position before placing the screen in a suitable vacuum frame Post expose with daylight or exposure lamp to produce a more water-resistance stencil! 5. Stencil quality Perfect mesh bridging is possible After wash-out the stencil is very hard and has low swell characteristics

FOTECO

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TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1833

For garment printing Designed for use with DLE (Direct Light Exposure for CtS)

6. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct a light. Protect also against freezing. Condition

Service Life

Pre-coated screens in total darkness at 20ºC

up to a week

Unsensitized, 18-25ºC storage

2 years

7. Stencil removal

info.fotec@saati.com

Remove all ink residues immediately after printing with an appropriate solvent. All commercial decoaters can be used. A high pressure gun is recommended. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 or 2089 can be used to remove all ink and emulsion residues; jet wash is necessary. 7. health & safety Before using, refer to appropriate material safety data sheet (MSDS).

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1010 1. Description Fast, dual cure Diazo photopolymer screen process emulsion with separate Diazo sensitizer powder, for solvent based and co-solvent ink systems (inks containing a combination of solvents and water) including water based graphic arts inks and aqueous UV inks.

Light purple color Medium viscosity Short exposure time Must be processed and stored at temperatures not over 20°C

info.fotec@saati.com

2. Directions 40% solids content before sensitizing (approx. 36% after sensitizing) Can be coated wet on wet without intermediate drying cycle to reach a flat stencil profile with an Rz-value of approximately 7 - 8 at 10 - 12 microns. Stencils made with FOTECOAT 1010 can be printed with all ink systems containing both solvent/water or only solvents 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh

Coating

Stencil Thickness below mesh

90-48 polyester monofilament

2/3

12 µm

77-55 polyester monofilament 120-34 polyester monofilament 150-31 polyester monofilament

2/3 2/2 1/2

16 µm 9 µm 6 µm

To reach a flatter stencil surface and to lower the Rz-value to improve edge sharpness of the print, 1 or 2 additional coats can be applied after the intermediary drying cycle. Stencil thickness will increase by 1-2 microns and the Rz-value decrease to 6-7 microns. FOTECOAT 1010 is ideal for machine coating. If necessary the emulsion can be diluted with water. 4. Stencil Quality Definition and resolution are excellent. Perfect mesh bridging is possible. After wash-out the stencil is very hard and has low swell characteristics. Printing with most ink types is possible. For long runs with aqueous textile inks and pure water media, FOTECOAT 1915 WR, FOTECOAT 1065 or 1636 are recommended.

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1010 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 20ºC (pot life)

4 weeks

Pre-coated screens in total darkness at 20ºC

2 months

6. exposure times 5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time. Stencil Thickness Below Mesh

Time (seconds)

120-34 yellow

150-31 yellow

12 µm

90-48 white

9 µm

16 µm

info.fotec@saati.com

Type of Mesh

6 µm

77-55 white

For fine details a post exposure is recommended. 7. Removal All commercial decoaters can be used. A high pressure gun is recommended. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

45 40 70

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1015 WR

Same as 1915 WR, but Diazo in a bottle to be dissolved in water – NO DIR-AD

1. Description Fast, dual cure polymer type textile printing screen process emulsion with separate Diazo sensitizer powder, for aqueous ink systems. Blue colour with excellent see-through. The ready-made stencil can be posthardened by light to increase the mechanical and the solvent resistance. Very short exposure time

info.fotec@saati.com

2. Applications Advantages 41% solids content Medium viscosity, appropriate for meshes between 45 T and 120 T (lower viscosity than FOTECOAT 1065 and a higher viscosity than FOTECOAT 1636) FOTECOAT 1015 WR is a water resistant emulsion that can be printed with most inks containing water and little solvents A longer exposure renders the stencil more resistant against abrasion and therefore allows to print longer runs FOTECOAT 1015 WR can be decoated If a permanent stencil for all inks is desired a longer post-hardening by light or a chemical treatment with FOTECHEM 2110 or 2100 Hardener can be used. In such a case the stencil can no longer be decoated 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh

Coating

Stencil Thickness below mesh

43 T monofilament

1/1

20 µm

43 T multifilament

77 T monofilament

120 T monofilament 120 T monofilament

1/2 1/2 1/1 2/3

FOTECOAT 1015 WR is ideal for machine coating. If necessary the emulsion can be diluted with water to reach a lower viscosity 4. Stencil Quality The definition is excellent. The high solids content allows to reach a flat stencil surface combined with excellent mesh bridging The resolution is good

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

20 µm 15 µm 4 µm

14 µm

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1015 WR

Same as 1915 WR, but Diazo in a bottle to be dissolved in water – NO DIR-AD

5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

1-2 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

3 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; iron charged high pressure burner at 100 hours burning time Coating

Type of Mesh

Time (seconds)

1/2

43 T multifilament white

100

1/1

43 T monofilament white

1/2

43 T monofilament dyed

105

1/2

77 T monofilament white

1/2

77 T monofilament dyed

135

1/1

120 T monofilament white

1/1

120 T monofilament dyed

1/2

120 T monofilament white

1/2

120 T monofilament dyed

2/3

120 T monofilament white

2/3

120 T monofilament dyed

105

For fine details a post exposure is recommended. 7. Removal Only possible with high pressure gun. A higher concentrated remover than usual has to be used. Ideal are FOTECHEM 2004 liquid or FOTECHEM 2005 paste. For machine decoating the concentration of the remover liquid has to be increased and the speed of the machine be reduced to a minimum. A post-exposure makes the stencil removal easier 8. post-exposure Once the stencil is washed-out and dried it can be exposed again under the sun, day light fluorescent tubes or with the standard exposure lamp; it is recommended to make the post-exposure without the vacuum frame so that no glass between the lamp and the stencil interferes with light absorption.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1018

General industrial and display graphics

1. Description Unique resistance against very strong solvents and excellent printing quality Dual-cure diazo photopolymer screen process emulsion with separate Diazo sensitizer powder, for co-solvent ink systems Extraordinary print definition and resolution on any mesh Very good adhesion for long printing runs Blue colour High viscosity Short exposure time Must be processed and stored at temperatures not over 20°C

info.fotec@saati.com

2. Applications Advantages 40% solids content before sensitizing (approx. 36% after sensitizing) Can be coated wet on wet without intermediate drying to reach a flat stencil profile with an Rz-value of approx 7-8 at 10-12 microns Stencils made with FOTECOAT 1018 can be printed with most inks containing solvents and water Easy to reclaim 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 43 T multifilament 43 T monofilament 77 T monofilament 120 T monofilament

Coating 1/2 1/1 1/2 1/1

Stencil Thickness below mesh 20 µm 20 µm 15 µm 4 µm

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1018

General industrial and display graphics

5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 20ºC (pot life)

4 weeks

Pre-coated screens in total darkness at 20ºC

2 months

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Stencil thickness below mesh

Type of Mesh

Time (seconds)

6 µm

150-31 yellow

12 µm

120-34 yellow

16 µm

90-48 white

20 µm

77-55 white

For fine details a post exposure is recommended. 7. Removal All commercial decoaters can be used. A high pressure gun is recommended FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2048 is an efficient liquid concentrate (1:30) FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1019 1. Description Fast, dual-cure Diazo photopolymer screen process emulsion with separate Diazo sensitizer powder, for co-solvent ink systems (inks containing a combination of solvents and water). Purple color High viscosity Short exposure time Ecologically sound Must be processed and stored at temperatures not over 20°C 2. Applications Advantages

info.fotec@saati.com

40% solids content before sensitizing (approx. 36% after sensitizing) Can be coated wet on wet without intermediate drying to reach a flat stencil profile with a Rzvalue of approximately 7 - 8 at 10 - 12 microns Stencils made with FOTECOAT 1019 can be printed with most inks containing solvents and water 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 77-55 polyester monofilament 90-48 polyester monofilament 120-34 polyester monofilament 150-31 polyester monofilament

Coating 2/3 2/3 2/3 2/2

Stencil Thickness below mesh 20 µm 16 µm 12 µm 6 µm

To reach a flatter stencil surface and to lower the Rz-value to improve edge sharpness of the print, 1 or 2 additional coats can be applied after the inter-mediary drying cycle. Stencil thickness will increase by 1-2 microns and the Rz-value goes down to 6-7 microns. FOTECOAT 1019 is ideal for machine coating. If necessary the emulsion can be diluted with water 4. Stencil Quality Definition and resolution are excellent. Perfect mesh bridging is possible. After wash-out the stencil is very hard and has low swell characteristics

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1019 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 20ºC (pot life)

4 weeks

Pre-coated screens in total darkness at 20ºC

2 months

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Stencil thickness below mesh

Type of Mesh

Time (seconds)

6 µm

150-31 yellow

12 µm

120-34 yellow

16 µm

90-48 white

20 µm

77-55 white

For fine details a post exposure is recommended. 7. Removal All commercial decoaters can be used. A high pressure gun is recommended FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating; FOTECHEM 2048 is an efficient liquid concentrate (1:30) FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1020 1. Description Very fast, dual cure Diazo photopolymer screen process emulsion with separate Diazo sensitizer powder, for solvent based and UV-inks. Light purple color Medium viscosity Designed for Direct Light Exposure with digital UV-bulbs, laser and exposure diodes Can also be exposed with standard contact light systems

info.fotec@saati.com

2. Applications Advantages 30% solids content before sensitizing (approx. 27% after sensitizing) Can be coated wet on wet without intermediate drying cycle to reach an adequate stencil profile. Ca. 25% shorter exposure time than fast Diazo emulsions

3. Coating technique and stencil build-up (coating trough .75 mm R) To reach a flatter stencil surface and to lower the Rz-value to improve edge sharpness of the print, 1 or 2 additional coats can be applied after the intermediary drying cycle. Stencil thickness will increase by 1 - 2 microns. FOTECOAT 1020 is ideal for machine coating. 4. Stencil Quality Definition and resolution are excellent. Perfect mesh bridging is possible. After wash-out the stencil is very hard and has low swell characteristics

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1020 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 20ºC (pot life)

2 weeks

Pre-coated screens in total darkness at 20ºC

2 months

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Stencil thickness below mesh

Type of Mesh

Time (seconds)

6 µm

150-31 yellow

9 µm

120-34 yellow

12 µm

100-48 white

For fine details a post exposure is recommended. The usage of FOTECHEM 2154 (“Liquid Light”) to avoid softness by under-exposure is possible 7. Removal All commercial decoaters can be used. A high pressure gun is recommended FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating; FOTECHEM 2048 is an efficient liquid concentrate (1:30) FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1022

Perfect dual-cure emulsion for graphic and industrial market. High solvent resistance, low friction, suitable for CtS

1. Description Fastest, among our dual cure Diazo emulsions. Designed for Direct Light Exposure with digital UV-bulbs, laser and exposure diodes Can also be exposed with standard contact light systems For solvent based and UV-inks Purple color Medium viscosity

info.fotec@saati.com

2. Applications Advantages 38% solids content before sensitizing (approx. 35% after sensitizing). Can be coated wet on wet without intermediate drying cycle to reach an adequate stencil profile. Ca. 25% shorter exposure time than fast Diazo emulsions 3. Coating technique and stencil build-up (coating trough .75 mm R) To reach a flatter stencil surface and to lower the Rz-value to improve edge sharpness of the print, 1 or 2 additional coats can be applied after the intermediary drying cycle. Stencil thickness will increase by 1 - 2 microns. FOTECOAT 1022 is ideal for machine coating. 4. Stencil Quality Definition and resolution are excellent Perfect mesh bridging is possible After wash-out the stencil is very hard and has low swell characteristics

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1022

Perfect dual-cure emulsion for graphic and industrial market. High solvent resistance, low friction, suitable for CtS

5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 20ºC (pot life)

4 weeks

Pre-coated screens in total darkness at 20ºC

2 months

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Stencil thickness below mesh

Type of Mesh

Time (seconds)

6 µm

150-31 yellow

9 µm

120-34 yellow

12 µm

100-48 yellow

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1025

triple cure photo-emulsion for flatbed textile printing very sort exposure time: suitable for CtS

1. Description Triple-cure emulsion for printing plastisol, water-based and discharge inks Can be chemical hardened with FOTECHEM 2119 to produce a waterproof and abrasion resistant stencil High resolution Faster in exposure compared to 1099; it allows to reduce exposure time by 40-50%

info.fotec@saati.com

2. Directions 45% solids content before sensitizing (approx. 41% after sensitizing) Can be coated wet on wet without intermediate drying to reach a flat stencil profile with an Rz-value of approx 7-8 at 10-12 microns Low odour, blue Easy to reclaim (before hardening)

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh

Coating

Stencil Thickness below mesh

77-55

1/2

16 µm

43-80 120-34 120-34

1/1 1/1 1/2

25 µm 6 µm

10 µm

Intermediate drying and post-coating improve the Rz-value The stencil surface is semi-mat and has no tendency to get sticky The stencil should be completely dry before exposing; for drying never use heat over 40°C 4. Stencil Quality It is advisable to treat the mesh prior to coating with an abrasive and degreasing paste like FOTECHEM 2023; at least the screens should be degreased thoroughly.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1025

triple cure photo-emulsion for flatbed textile printing very sort exposure time: suitable for CtS

5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

1 week

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time. Coating

Type of Mesh

Time (seconds)

1/1

43-80 white

1/1

43-80 white

1/1

43-80 yellow

1/1

43-80 yellow

1/1

77-55 white

1/1

77-55 white

1/1

120-34 white

1/1

120-34 white

1/1

120-34 yellow

1/1

120-34 yellow

7. Removal

FOTECO stencil decoating chemicals can be used The decoating chemicals should never dry on the stencil Make sure the screen filler is dissolved first with water before decoating starts Whenever possible degrease before the decoater is being applied; this facilitates decoating and helps to prevent ghost pictures. FOTOCHEM 2033 is an ideal degreaser concentrate For the regeneration of the decoated mesh FOTECHEM 2080/2085 can be used to remove all ink and emulsion residues; jet wash is necessary Diazo stains can be bleached out after decoating with FOTECHEM 2089 Important: A fully exposed stencil, with full thru curing, or a postexposure, facilitates the stencil removal

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1030 1. Description Fast, dual-cure diazo photopolymer screen process emulsion with separate diazo sensitizer powder, for co-solvent ink systems (inks containing a combination of solvents and water) Blue colour Middle viscosity Middle speed in exposure time Ecologically sound Must be processed and stored at temperatures not over 20°C

info.fotec@saati.com

2. Applications Advantages 40% solids content before sensitizing (approx. 38% after sensitizing) Can be coated wet on wet without intermediate drying to reach a flat stencil profile with an Rz-value of appreciatively 7-8 μm Stencils made with FOTECOAT 1030 can be printed with most inks containing solvents and water

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 77-55 polyester filament 90-48 polyester filament 120-34 polyester filament 150-31 polyester filament

Coating 2/3 2/3 2/3 2/2

Stencil Thickness below mesh 20 µm 16 µm 12 µm 6 µm

To reach a flatter stencil surface and to lower the Rz-value to improve edge sharpness of the print, 1 or 2 additional coats can be applied after the inter-mediary drying cycle. Stencil thickness will increase by 1-2 microns and the Rz-value goes down to 6-7 microns. FOTECOAT 1030 is ideal for machine coating. If necessary the emulsion can be diluted with water 4. Stencil Quality Definition and resolution are excellent Perfect mesh bridging is possible After wash-out the stencil is very hard and has low swell characteristics

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1030 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 20ºC (pot life)

4 weeks

Pre-coated screens in total darkness at 20ºC

2 months

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Stencil thickness below mesh

Type of Mesh

Time (seconds)

6 µm

150-31 yellow

12 µm

120-34 yellow

16 µm

90-48 white

20 µm

77-55 white

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1060 1. Description Fast, dual-cure diazo photopolymer screen process emulsion with separate diazo sensitizer powder, for co-solvent ink systems (inks containing a combination of solvents and water) Blue colour Middle viscosity Middle speed in exposure time Ecologically sound Must be processed and stored at temperatures not over 20°C

info.fotec@saati.com

Coating 1/1 1/1 1/2

Stencil Thickness below mesh 20 µm 30 µm 18 µm

4. Stencil Quality Definition and resolution are excellent Perfect mesh bridging is possible After wash-out the stencil is very hard and has low swell characteristics

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1060 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Unsensitized, 18-25ºC storage

18 months

Sensitized, stored at 20ºC (pot life)

4 weeks

Pre-coated screens in total darkness at 20ºC

2 months

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Stencil thickness below mesh

Type of Mesh

Time (seconds)

6 µm

150-31 yellow

12 µm

120-34 yellow

16 µm

90-48 white

20 µm

77-55 white

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1065 1. Description Fast, duo-cure polymer textile printing screen process emulsion with separate Diazo sensitizer powder, for aqueous ink systems Blue color with excellent see-through The ready-made stencil can be posthardened by light to increase the resistance Very short exposure time

info.fotec@saati.com

2. Applications Advantages 48% solids content before sensitizing High viscosity (adapted for coarse mesh) Can be coated wet on wet without intermediate drying down to a 18 T PE mesh Stencils made with FOTECOAT 1065 can be printed with most inks containing water. Depending on the aqueous ink system the stencil can be post-hardened with light to reach longer runs. Such a post-hardening makes the stencil also more resistant against solvents that could be contained in the aqueous ink. Can also be post-hardened with FOTECHEM 2110 or 2100 if a permanent stencil for all inks is desired. The FOTECHEM 2110 treatment does not need heat. The stencil can no longer be decoated 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 18 T monofilament 43 T monofilament 43 T monofilament 120 T monofilament 120 T monofilament

Coating 1/2 1/2 1/1 1/1 1/2

Stencil Thickness below mesh 16 µm 23 µm 23 µm 6 µm 16 µm

Because of the high viscosity of FOTECOAT 1065 it is recommended to degass the emulsion after sensitizing during a few hours A 1/1 coating on coarse meshes is possible. The stencil build-up and hence the sharpness of the printed edge will however decrease FOTECOAT 1065 is ideal for machine coating. If necessary the emulsion can be di-luted with water 4. Stencil Quality Definition and resolution are excellent The high solids content guarantees a flat stencil surface combined with excellent mesh bridging The resolution is good

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1065 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

1-2 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

3 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Coating

Type of Mesh

Time (seconds)

1/2

18 T White

1/2

43 T Multifilament White

1/1

43 T Monoifilament White

1/2

43 T Monofilament Dyed

1/1

120 T Monofilament White

1/2

120 T Monofilament White

1/1

120 T Monofilament Dyed

1/2

120 T Monofilament Dyed

7. Removal Only possible with high pressure gun. A highly concentrated decoater has to be used like FOTECHEM 2004 liquid or FOTECHEM 2005 paste A post-exposure makes stencil removal easier 8. post-exposure Once the stencil is washed-out and dryed it can be exposed again under the sun, day light fluorescent tubes or with the exposure lamp in the vacuum frame or out-side of the frame.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1066

Direct ceramic tile printing with high stencil build-up 1. Description Dual-cure emulsion with 50% solid content to produce thick stencils Fast exposing with wide latitude Resistant to weak solvent-based and water-based inks Light blue Sensitizing with separate Diazo powder: C20 for 1 kg set; C89 for 4,5 kg set.

info.fotec@saati.com

2. Applications Advantages Very high solids content (50%) and high viscosity can produce 300 μm stencil thickness Extra good flexibility The ready to print screens can be postexposed to increase the printing resistance For longer runs a chemical hardening (catalyser) is necessary 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 43-80 white 34-100 white 34-100 white 24-120 white 24-120 white 24-120 white

Coating 2/2 2/4 2/3 2/5 2/2 2/4

4. Stencil Quality Thanks to the high solids content FOTECOAT 1066 produces a low Rz-value (flat stencil profile) coupled with excellent resolution.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

Stencil Thickness below mesh 30 µm 80 µm 60 µm 120 µm 40 µm 120 µm

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1066

Direct ceramic tile printing with high stencil build-up

5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4 weeks

Unsensitized, 18-25ºC storage

Pre-coated screens in total darkness at 20ºC

18 months 3 weeks

6. exposure times Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time. Perform an exposure test with one of two calculators now available (Exposure Calculator and 21 Step Sensitivity Guide) to determinate correct exposure time for a complete cure.

info.fotec@saati.com

7. Chemical Hardening Recommended is FOTECHEM 2130. The hardener can be applied by the usual method. The penetrating and drying times recommended by the manufacturer should be kept to reach the best possible result. 8. Removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 can be used to remove all ink and emulsion residues; jet wash is necessary. Diazo stains can be bleached out after decoating with FOTECHEM 2089.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1068

Textile printing with inks containing water and solvents; ideal for plastisoles, glass and ceramic printing.

1. Description Same as 1015 WR, but Diazo can be added directly to emulsion, without water: DIR-AD Fast, dual cure polymer type textile printing screen process emulsion with separate Diazo sensitizer powder, for aqueous ink systems Light purple colour with excellent see-through The ready-made stencil can be post-hardened by light to increase the mechanical and the solvent resistance Very short exposure time Ecologically sound

info.fotec@saati.com

Coating 1/1 1/2 1/2

4. Stencil Quality The definition is excellent. The high solids content allows to reach a flat stencil surface combined with excellent mesh bridging.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

Stencil Thickness below mesh 20 µm 30 µm 18 µm

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1068

Textile printing with inks containing water and solvents; ideal for plastisoles, glass and ceramic printing.

5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

3 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Coating

Type of Mesh

Time (seconds)

1/2

18 T White

1/2

43 T Multifilament White

1/1

43 T Monoifilament White

7. Stencil Hardening Recommended is FOTECHEM 2130. The hardener can be applied by the usual method. The penetrating and drying times recommended by the manufacturer should be kept to reach the best possible result. 8. Stencil removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 can be used to remove all ink and emulsion residues; jet wash is necessary. Diazo stains can be bleached out after decoating with FOTECHEM 2089.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1069

Textile printing with inks containing water and solvents; ideal for plastisoles, glass and ceramic printing.

1. Description Fast dual cure polymer screen emulsion; blue Sensitizing with separate Diazo powder: C2 for 1 kg set, C7 for 4,5 kg set The ready to print screens can be postexposed to increase the printing resistance For longer runs a chemical hardening (catalysing) is necessary

info.fotec@saati.com

2. Applications Advantages Solids content after sensitizing: 41%, before sensitizing 45%. Medium viscosity Extra good flexibility Good transparency Excellent water and solvent resistance

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 43-80 white 43-80 white 77-55 white 120-34 yellow

Coating 1/1 1/2 1/2 1/2

4. Stencil Quality Thanks to the high solids content FOTECOAT 1069 produces a low Rz-value (flat stencil profile) coupled with excellent resolution.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

Stencil Thickness below mesh 20 µm 30 µm 18 µm 16 µm

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1069

Textile printing with inks containing water and solvents; ideal for plastisoles, glass and ceramic printing.

5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

3 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Time (seconds)

Coating

Type of Mesh

1/1

43-80 white

1/2

43-80 white

125

1/2

77-55 white

1/2

120-34 yellow

100

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1070 matt 1. Description Fast, dual-cure Diazo photopolymer screen process emulsion with separate Diazo sensitizer powder, for co-solvent ink systems (inks containing a combination of solvents and water) Purple color High viscosity Short exposure time Must be processed and stored at temperatures not over 20°C

info.fotec@saati.com

2. Applications Advantages 42% solids content before sensitizing (38% after sensitizing) Can be coated wet on wet without intermediate drying to reach a flat stencil profile with a Rz-value of approx. 7-8 at 10-12 microns Stencils made with FOTECOAT 1070 matt can be printed with most inks containing solvents and water

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 77-55 polyester monofilament 90-48 polyester monofilament 120-34 polyester monofilament 150-31 polyester monofilament

Coating 2/3 2/3 2/3 2/2

Stencil Thickness below mesh 20 µm 16 µm 12 µm 6 µm

To reach a flatter stencil surface and to lower the Rz-value to improve edge sharpness of the print, 1 or 2 additional coats can be applied after the inter-mediary drying cycle. Stencil thickness will increase by 1-2 microns and the Rz-value goes down to 6-7 microns. FOTECOAT 1070 matt is ideal for machine coating. If necessary the emulsion can be diluted with water 4. Stencil Quality Definition and resolution are excellent. Perfect mesh bridging is possible. After wash-out the stencil is very hard and has low swell characteristics.

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1070 matt 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

4 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

8 weeks

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Stencil Thickness Below Mesh

Type of Mesh

Time (seconds)

6 µm

150-31 yellow

12 µm

120-34 yellow

16 µm

90-48 white

20 µm

77-55 white

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1072 1. Description Fast, dual-cure Diazo-polymer screen process emulsion with separate Diazo sensitizer powder, for solvent based inks. Purple color, excellent definition and resolution. Solvent and humidity resistant. The ready-made stencil can be posthardened by light to increase the ink suitability and to facilitate stencil removal. Short exposure time

info.fotec@saati.com

2. Applications Advantages 38% solids content before sensitizing; approx. 34% after sensitizing. Medium viscosity; ideal for very fine meshes. Can be coated wet on wet without intermediate drying to reach on a 120-34 polyester mesh a stencil build-up below the mesh of approximately 12 microns. Stencils made with FOTECOAT 1072 can be printed with aggressive inks containing solvents and can be decoated with the usual chemicals 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 77-55 polyester monofilament 120-34 polyester monofilament 120-34 polyester monofilament 120-34 polyester monofilament 140-34 polyester monofilament

Coating 2/3 1/2 2/3 2/3, 2 face coats 1/2

Stencil Thickness below mesh 20 µm 10 µm 14 µm 16 µm 8 µm

To reach a flatter stencil surface and to lower the Rz-value to improve edge sharpness of the print, 1 or 2 additional coats can be applied after the inter-mediary drying cycle. Stencil thickness will increase by 1-2 microns and the Rz-value goes down to 6-7 microns. FOTECOAT 1072 matt is ideal for machine coating. If necessary the emulsion can be diluted with water 4. Stencil Quality Definition and resolution are excellent and reaches approximately 40 microns The stencil surface is mat and has no tendency to stick to the substrate during the printing process or to the film positive The stencil edges show excellent mesh bridging A Rz-value of 7-8 microns is reached at 14 microns stencil thickness

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1072 5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

3-4 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

4 months

6. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time coating

Type of Mesh

Time (seconds)

1/2

120 T white

1/2

120 T dyed

2/3

120 T white

2/3

120 T dyed

2/3 with 2 face coats

120 T dyed

120

2/3

77 T dyed

140

1/2

140 T dyed

7. Stencil removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 can be used to remove all ink and emulsion residues; jet wash is necessary. Diazo stains can be bleached out after decoating with FOTECHEM 2089.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1075

Developed for printing with abrasive inks

1. Description Fast, solvent resistant Diazo photopolymer screen emulsion, dual-cure Excellent flexibility coupled with improved adhesion to the mesh Very high definition and resolution Appropriate for long press life for the packaging printing industry Good transparency with light purple colour Recommended for UV inks

info.fotec@saati.com

2. Application advantages Recommended for use in the glass decoration, ceramic printing and ceramic decalcomania’s 32% solids content before sensitizing Medium viscosity; can be used with very fine meshes Solvent resistant; by post-exposure the stencil can be hardened so that inks containing small amounts of water can be printed for short runs 60% exposure time compared with a standard Diazo emulsion Can be decoated with the usual chemicals

3. Coating technique and stencil build-up Mesh 77 T monofil 120 T monofil 120 T monofil 120 T monofil 140 T monofil

Coating 2/3 1/2 2/3 2/3, + 2 face coats 1/2

4. Stencil quality The resolution is excellent and reaches approximately 40 microns. The printing edge sharpness is very good. The stencil is less humidity sensitive. After wash-out the stencil is hard. Wash-out with high pressure is possible. Thanks to the excellent solvent resistance the printing ink does not harden the stencil; removal is therefore possible. A chemical post-hardening improves press-life but makes the stencil permanent.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

EOM 20 µm 10 µm 14 µm 16 µm 8 µm

TECHNISCHE INFORMATION

Appiano Gentile, Mai 2014

FOTECOAT 1075

Spezialqualität für den Druck mit abrasiven Farben

5. Storage Je frischer das Diazo, desto länger kann die sensibilisierte Kopierschicht aufbewahrt werden. Alter, Transport und Lager Bedingungen beeinflussen die Qualität der Kopierschicht wesentlich. Condition

Service Life

Unsensitized at 18-25ºC

up to 18 months

– Shelf life for storing of pre-coated screens in the dark at 20°C

4 months

Sensitized and stored at 20ºC (pot life)

4-6 weeks

6. Exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; iron charged high pressure burner at 100 hours burning time. Coating

Mesh

Exposure Time in Seconds

1/2

120 T white

1/2

120 T dyed

2/3

120 T white

2/3

120 T dyed

2/3 +2

120 T dyed

120

2/3

77 T dyed

140

1/2

140 T dyed

7. decoating Remove ink first, then start removal. FOTECO offers a variety of decoaters FOTECHEM 2004 - liquid and ready to use FOTECHEM 2005 - Paste (ideal for large size stencils) FOTECHEM 2048 - 1:30 liquid concentration FOTECHEM 2044 - powder, 100g for 8-10 liters of water

SAATI S.p.A. These Technical Information are published without warranty. The results shown in these Technical Information are based on laboratory testing. The supplier declines any responsibility for incorrect use of this product which is manufactured and sold for industrial use only.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1079

Unique resistance against very strong solvents and excellent printing quality - Extra high resolution

1. Description Dual-cure emulsion resistant to UVcured, solvent- and water based inks Excellent print definition and resolution on any mesh Uncommon solvent resistance: should be used with inks containing NMP and DMAC and treated with ethyl alcohol Easy to decoat Blue colour Low viscosity

info.fotec@saati.com

2. Applications Advantages Designed for maximum resistance to super solvents 34% solids content after sensitizing Thanks to its extraordinary composition it can be used for finest line printing The best results can be achieved by exposing with a Fresnel-lens MH-lamp 3. Coating technique and stencil build-up (coating trough .75 mm R) FOTECOAT 1079 should be coated by machine For steel mesh a coating trough with a steel blade lip should be used On polyester a sharp standard blade is adequate 4. Stencil Quality With correct exposure with a Fresnel-lamp and adequate coating equipment 20 micron lines can be opened on suitable mesh types Perfect mesh bridging is possible because of the ideal viscosity adapted to the mentioned mesh types. After wash-out the stencil is very hard and has low swell characteristics

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1079

Unique resistance against very strong solvents and excellent printing quality - Extra high resolution

5. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Unsensitized, 18-25ºC storage

Sensitized, stored at 20ºC (pot life)

Pre-coated screens in total darkness at 20ºC

Service Life 18 months 2 weeks

2 months

info.fotec@saati.com

6. exposure times Ensure that all surfaces (emulsion, film and glass), are free of dust to minimize pinholes. Contact the emulsion side of the positive with the substrate side of the screen and secure in position before placing the screen in a suitable vacuum frame. Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time. Perform an exposure test with one of two calculators now available (Exposure Calculator and 21 Step Sensitivity Guide) to determinate correct exposure time for a complete cure 7. Stencil removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 can be used to remove all ink and emulsion residues; jet wash is necessary Diazo stains can be bleached out after decoating with FOTECHEM 2089

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1090

Rotary textile printing, even compatible with industrial discharges

1. Description Dual cure, polymer screen emulsion; blue Sensitizing with separate Diazo powder: C119 dissolved in 300 g water to make 4,8 kg set The ready to print screens can be polymerized by heat 190-200°C (374-392°F) to obtain mechanical and chemical resistance Developed for conventional, laser, digital (wax and ink jet) and DLE engraving Optimum resolution for fine lines and half-tones

info.fotec@saati.com

2. Applications Advantages

Solids content after sensitizing: 45% Excellent adhesion to nickel screens Excellent water- and solvent resistance Extra good flexibility

3. Sensitizing and mixing Dissolve the dose of Diazo preferably with demineralised water, filling half bottle and shake vigorously For bottom to top coating and top to bottom double squeegee, mix 1000 g of FOTECOAT 1090 only with dissolved sensitizer For best results, use the emulsion after 12 hours from mixing to enable air bubbles to escape 4. screen preparation and degreasing Thoroughly degrease the rotary screen prior to use with FOTOCHEM 2003 Dry and store rotary screen in a dust free, dry environment 5. coating For bottom to top method by hand or machine, apply one coat and dry at 40°C (104°F). If higher thickness is requested, after drying apply one or two coats more and dry again Using double squeegee, top to bottom, we suggest a coating speed of 1-2 m/ min. Only one coat is sufficient to guarantee perfect resistance 6. drying Thoroughly dry the coated screen at a temperature of 40°C (104°F) in a well-ventilated oven.

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1090

Rotary textile printing, even compatible with industrial discharges

7. exposing For photo engraving, the exposure time depends on the light source, the mesh count and the length of the cylinder For example, expose a 125 mesh, 1 m length, coated top to bottom using double squeegee for 6 minutes with blue fluorescent tubes or for 8 minutes using xenon 6 kW lamp When different coating methods are used, you must adjust exposure times depending on the emulsion thickness 8. Developing Soak the engraved screen in a tank of water for 5 to 10 minutes or use an automatic washing machine In either case, ensure a thorough final rinse

info.fotec@saati.com

9. reclaiming Before polymerization, you may remove FOTECOAT 1090 with FOTECHEM 2004, 2005 or dilute 2048 up to 1:30 10. polymerization Place the screen into oven at 190°-200°C (374°-392°F) for 1 h, starting when temperature indicated is reached After polymerization the stencil is permanent (not reclaimable anymore) 11. health & safety Before using, refer to appropriate material safety data sheets (MSDS). To receive the MSDS, please send an e-mail to: SDS@saatichem.com 12. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

2-3 weeks

Unsensitized, 18-25ºC storage

Pre-coated screens in total darkness at 20ºC

18 months 1 week

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1091

For rotary textile printing, Dichromate-sensitized photo emulsion

1. Description Dual cure, polymer screen emulsion; red Dichromate-sensitized photo emulsion for laser or conventional photo engraving The ready to print screens can be polymerized by heat 180-190°C (356-374°F) to obtain mechanical and chemical resistance Very high mechanical and chemical resistance Developed for conventional, laser, digital (wax and ink jet) and DLE engraving Optimum resolution for fine lines and half-tones

info.fotec@saati.com

2. Applications Advantages Solids content before sensitizing: 34% Excellent adhesion to nickel screens Excellent water- and solvent resistance

3. Sensitizing and mixing Dissolve the dose of Dichromate preferably with demineralised water, filling half bottle and shake vigorously For top to bottom coating, single squeegee, mix 1 kg of 1091, 200 grams of Dichromate and 250 grams of demineralized water For bottom to top coating and double squeegee top to bottom, mix 1 kg of 1091 and 200 grams of Dichromate Use the emulsion after 12 hours from mixing to enable air bubbles to escape For best results, use sensitized emulsion within 48 hours 4. screen preparation and degreasing Thoroughly degrease the rotary screen prior to use with FOTOCHEM 2003 Dry and store rotary screen in a dust free, dry environment 5. coating Use with rotary screen coating equipment. For top to bottom method, using a single squeegee machine, we recommend a coating speed of 10cm/min to obtain an uniform deposit of emulsion on the screen from the top to the bottom. Apply only one coat For bottom to top method by hand or machine, apply one coat and dry at 40°C (104°F). If you require a thicker stencil, apply two more coats and dry at 40°C (104°F) For top to bottom by double squeegee, one coat is enough to guarantee very high resistance. Coating speed suggested is 1 mt/min 6. drying Thoroughly dry the coated screen at a temperature of 40°C (104°F) in a well-ventilated oven.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1091

For rotary textile printing, Dichromate-sensitized photo emulsion

7. exposing For photo engraving, the exposure time depends on the light source and the mesh count. For example, expose a 125 mesh (coated top to bottom using a single squeegee) for 6 minutes with blue fluorescent tubes or for 8 minutes using a 6 kW lamp When different coating methods are used, you must adjust exposure times depending on the emulsion thickness For laser engraving, we recommend to expose the rotary screen to an UV lamp source before polymerization. Polymerize the screen and laser engrave it 8. Developing Soak the engraved screen in a tank of water for 5 to 10 minutes or use an automatic washing machine. In either case, ensure a thorough final rinse.

info.fotec@saati.com

9. reclaiming Before polymerization, you may remove 1091 with FOTECHEM 2004, liquid FOTECHEM 2005 paste or FOTECHEM 2048 dilute up to 1:30 10. polymerization Place the screen into oven at 180-190°C (356-374°F) for 1 h, starting when temperature indicated is reached After Polymerisation the stencil is permanent (not reclaimable anymore) 11. health & safety Before using, refer to appropriate material safety data sheets (MSDS). To receive the MSDS, please send an e-mail to: SDS@saatichem.com 12. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

1-2 weeks

Unsensitized, 18-25ºC storage

Pre-coated screens in total darkness at 20ºC

18 months 1 week

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1099

Triple cure photo-emulsion for flatbed textile printing

1. Description Triple-cure emulsion for printing plastisol, water-based and discharge inks Can be chemical hardened with FOTECHEM 2119 to produce a waterproof and abrasion resistant stencil High resolution Slower in exposure but higher in solids compared to 1025

info.fotec@saati.com

2. Applications Advantages 48% solids content before sensitizing (approx. 43% after sensitizing) Can be coated wet on wet without intermediate drying to reach a flat stencil profile with an Rzvalue of approximately 7-8 at 10-12 microns Blue Reclaimable before hardening

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh

Coating

Stencil Thickness below mesh

90-48 polyester monofilament

2/3

12 µm

77-55 polyester monofilament 120-34 polyester monofilament 150-31 polyester monofilament

2/3 2/2 1/2

16 µm 9 µm 6 µm

It is advisable to treat the mesh prior to coating with an abrasive and degreasing paste like FOTECHEM 2023; at least the screens should be degreased thoroughly Intermediate drying and post-coating improve the Rz-value The stencil surface is semi-mat and has no tendency to get sticky The stencil should be completely dry before exposing; for drying never use heat over 40°C

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1099

Triple cure photo-emulsion for flatbed textile printing

4. storing The freshness of the Diazo controls the pot life. Age, transportation and storing conditions influence the quality of the emulsion drastically. Condition

Service Life

Sensitized, stored at 20ºC (pot life)

2-3 weeks

Unsensitized, 18-25ºC storage

18 months

Pre-coated screens in total darkness at 20ºC

1 week

5. exposure times

info.fotec@saati.com

5 kW metal halide lamp at 100 cm distance; photopolymer bulb at 100 hours operating time Coating

Type of Mesh

Time (seconds)

1/2

43-80 White

1/2

43-80 White

1/1

43-80 Yellow

1/2

43-80 Yellow

1/1

77-55 White

1/2

77-55 White

1/1

120-34 White

1/2

120-34 White

1/1

120-34 Yellow

1/2

120-34 Yellow

6. Stencil removal All commercial decoaters can be used. A high pressure gun is necessary. Stencil removal is only possible, if the screen has not been hardened chemically. FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier. For the regeneration of the decoated mesh FOTECHEM 2080/2085 can be used to remove all ink and emulsion residues; jet wash is necessary Diazo stains can be bleached out after decoating with FOTECHEM 2089

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Thick Film Stencils with FOTECOAT SOLO The choice for the adequate screen emulsion depends on the ink characteristics, the mesh number and the properties of the emulsion. 1. 5 fotecoat solo screen emulsions

Product

Ink

Viscosity

Solids

Color

1835 solo

aqueous

extra high

58%

Purple

1837 solo

aqueous

very high

52%

Pink

1845 solo

aqueous

very high

49%

Blue

1846 solo

solvents

high

44%

Blue

1847 solo

solvents

viscous

42%

Blue

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2. mesh numbers and total fabric thickness Product

Lowest No.

Highest No.

Total Fabric Thickness

1835 solo

10-270

54-137

2000 µm

1837 solo

18-180

61-70

1000 µm

1845 solo

10-270

54-137

1500 µm

1846 solo

21-150

77-48

1000 µm

1847 solo

32-100

90-230

600 µm

3. rules for the exposure time calculated from total fabric thickness Product

White

Yellow

Steel

1835 solo

1/3 =

1/2 =

1/1 =

1837 solo

seconds

1845 solo

for 100 µm

for 50 µm

for 30 µm

1846 solo

1847 solo

1 minute

3.5 kw Akticop s mh, distance 1m 4. how to use sheets The follwing Technical Information is available: - Fotecoat 1835 SOLO - Fotecoat 1837 SOLO - Fotecoat 1845 SOLO - Fotecoat 1846 SOLO - Fotecoat 1847 SOLO

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FOTECOAT 1811 1. Description High viscosity for coarse and fine meshes. Excellent flow-out avoiding pinholes caused by too fast coating 29% solids content for the ready-to-use emulsion Usable on white and yellow mesh Medium exposure time with outstanding exposure latitude on dyed mesh Can be exposed with almost all light sources; standard white actinic tubes need double exposure compared to super actinic purple light tubes Superior wet hardness after wash-out Fast wash-out Excellent resistance to solvent based inks and its screen washes Decoatable with all chemicals used for emulsion stencil removal Attention has to be paid to environment light; work and open can under yellow or tungsten light only; avoid day or stray light Is not affected by high humidity Can be dried at temperatures up to 60°C Can be hardened chemically with FOTECHEM 2100 or 2130 to improve the water resistance; the stencil however might become slightly less flexible. Post-exposure is not necessary and would not improve the stencil resistance 2. Applications Advantages No mixing (Diazo-free) needed Does not need degassing (do not pour back into same can) Can be coated wet on wet or, after an intermediate drying cycle, with additional coats on the printing side to reduce the Rz-value or on the squeegee side to reinforce the stencil for very long print runs Can be coated by machine or by hand, ideally with a coating trough with a lip radius of 1 mm Can be stored for two years 3. Coating technique

1/2 or 2/3 manually, wet in wet Dry print side down for wet in wet technique After an intermediate drying cycle dry print side up Machine coating: 1x up both sides simultaneously

4. Stencil Quality 120-34 Yellow Polyester 2/3 coating - 12 µm EOM - 50 µm Resolution - Outstanding edge definition and mesh bridging 120-34 White Polyester 2/3 coating - 12 µm EOM - 120 µm Resolution - Good edge definition and mesh bridging

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FOTECOAT 1811 5. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct light. Protect also against freezing. Service Life

Condition Unsensitized, 18-25ºC storage

2 years

Pre-coated screens in total darkness at 20ºC

6 months

6. exposure times

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With 5KW metal halide lamp with photopolymer bulb at 100 cm distance and 100 operating hours: Type of Mesh

Coating

Stencil thickness below mesh

Time (seconds)

120-34 yellow

2/3

12 µm

120-34 yellow

2/3

12 µm

43-90 yellow

1/2

12 µm

180

43-90 white

1/2

12 µm

140

7. Screen wash FOTECHEM 2090 is an economic and efficient low-evaporating screen wash. Odourless, prevents ghost pictures. 8. Stencil removal The old rule is valid: The better the hardening of the stencil system through a longer exposure time, the easier the stencil removal This screen emulsion is free of Diazo. Therefore no brownish residues on the mesh; the removal of ghost images is simplified The stencil removal is simplified if the ink is removed immediately after printing. Then firstly degreasing with FOTECHEM 2003 ready-to-use or FOTECHEM 2033 Concentrate, diluted 1:10, is recommended FOTECO offers several stencil removers: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder To speed up removal a high pressure device is recommended. Important: Hose off with soft spray first to remove the chemicals, then only use the power spray Ghost images: Brush on FOTECHEM 2085 (a blend of emulsifying solvents), then apply FOTECHEM 2080 (high alkaline paste) with a brush; let stand for maximum ½ hour, then hose off with mild spray before the residues are removed with a high power spray. Increase pressure to 100 bar or higher if residues are very stubborn

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FOTECOAT 1830

One component Photopolymer emulsion - for printing water or solvent based inks, also ideal for abrasive printing media

1. Description Ready to use emulsion Red, medium viscosity, 47% solid content Exposure time of 1830 is about 50% slower compared to 1833 and therefore the resolution is accordingly higher. Resistant to plastisol, water and solvent based, UV-, sublimation- and discharge inks Outstanding abrasion and humidity resistance Excellent print definition on any mesh

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2. Applications Advantages Resistant to discharge inks without adding Diazo or hardening with catalyst Exposes 4 times faster than Diazo or dual-cure emulsions Can be coated wet on wet without intermediate drying 3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 71.55 White

Coating 1/2

Stencil Thickness below mesh 24 µm

4. Exposure 1830 has high sensitivity to UV light and is suitable for use with DLE machines Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time Perform an exposure test a exposure calculator (21 Step Sensitivity Guide) to determinate correct exposure time for a complete cure Ensure that all surfaces (emulsion, film and glass) are free of dust to minimize pinholes Contact the emulsion side of the positive with the substrate side of the screen and secure in position before placing the screen in a suitable vacuum frame Post expose with daylight or exposure lamp to produce a more water-resistance stencil! 5. Stencil quality Perfect mesh bridging is possible After wash-out the stencil is very hard and has low swell characteristics

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FOTECOAT 1830

One component Photopolymer emulsion - for printing water or solvent based inks, also ideal for abrasive printing media

6. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct a light. Protect also against freezing. Condition

Service Life

Pre-coated screens in total darkness at 20ºC

4 weeks

Unsensitized, 18-25ºC storage

18 months

7. Stencil removal

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FOTECOAT 1833

For garment printing Designed for use with DLE (Direct Light Exposure for CtS)

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Resistant to discharge inks without adding Diazo or hardening with catalyst Exposes 8 times faster than Diazo or dual-cure emulsions Can be coated wet on wet without intermediate drying

3. Coating technique and stencil build-up (coating trough .75 mm R) Mesh 120-34

Coating 1/1

Stencil Thickness below mesh 6-7 µm

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FOTECOAT 1833

For garment printing Designed for use with DLE (Direct Light Exposure for CtS)

6. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct a light. Protect also against freezing. Condition

Service Life

Pre-coated screens in total darkness at 20ºC

up to a week

Unsensitized, 18-25ºC storage

2 years

7. Stencil removal

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FOTECOAT 1834 SOLO and FOTECOAT 1840 SOLO Both FOTECOAT emulsions can be used for The production of thick stencils by the casting process The transfer of THICKFILM FOTECAP TECNO FOTECOAT 1834 SOLO has good water resistance FOTECOAT 1840 SOLO has good solvent resistance The use of both FOTECOAT screen emulsions is described in the leaflet FOTECAP CAPILLARY FILMS.

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1. Description PRODUCT

FOTECOAT 1834 SOLO

FOTECOAT 1840 SOLO

Color

Light Green

Solids content

40%

41%

Viscosity at 25ºC

3500

5000

Type

Photopolymer Presensitized

Exposure Time

Very Short

It is recommended to use dyed mesh. Stainless steel mesh can be used. 2. Hints for stencil production 2.1 Casting Method Attention: The mesh must be stretched with a minimum of 30 newton/cm to avoid the cracking of the stencil After the pre-coating of the fabric (to clog the open mesh) choose the needed mask to cast in such a way that it is approximatively 4 x higher than the needed stencil thickness over the mesh Work on a levelled table only to avoid the flow-off of the emulsion after the casting. Let de-gas thoroughly before drying in the oven. Let dry completely at maximum 40°C. Use intervals during wash out; immerse in water and use soft spray with luke warm water. Highly recommended is a test exposure first. It is important that the screen emulsion is through-cured completely by the light. To avoid blisters use only de-gassed emulsion!

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FOTECOAT 1834 SOLO and FOTECOAT 1840 SOLO 2.2 Capillary Film Method Stretch fabric minimum 30 newton/cm With TECNO-films higher than 400 microns it is highly recommended to coat again from the squeegee side twice after the drying cycle To coat the emulsion use a sharp squeegee with 75 - 80 durometer Let de-gas completely before drying in the oven Both drying and exposure time are considerably shorter with FOTECAP TECNO than with the casting method Wash out with intervals; immerse in water and use soft spray with luke warm water. To finish use spray gun with low pressure After wash out use screen vacuum dryer from the squeegee side

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3. removal The usual products can be used It is important that the chemical can react long enough with the emulsion. Ideal is FOTECHEM paste 2005 Another method is to immerse the stencil in FOTECHEM 2004 liquid With FOTECAP TECNO only the emulsion is dissolved, the TECNO film detaches as a whole piece

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FOTECOAT 1834 SOLO 1. Beschrieb Grüne Einkomponenten Polymer Kopierschicht; gebrauchsfertig 40% Festkörper; 2200 cps Viskosität Ultra-schnelle Belichtungszeit Weitgehend lösemittelfest und stark verbesserte Flexibilität Entschichtbar mit Hochdruckgerät Für grobe und feine Polyesterund Stahlgewebe

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2. Verschiedene Verarbeitungsmethoden 1. Dickfilmschablonen auf feineren Geweben bis zu ca. 100 Mikrons (je nach Gewebe-Nr.) Gewebe entfetten Nass in nass 2x Druckseite und anschliessend 3x Rakelseite beschichten Trocknen in waagrechter Lage, Druckseite nach unten Ev. nachbeschichten Belichten, auswaschen 2. Dickfilmschablonen auf sehr groben Geweben bis zu 50 Mikrons Gewebe entfetten Von jeder Seite einmal beschichten; trocknen Die benötigte Schablonendicke auf der Druckseite durch mehrmalige Beschichtung aufbauen Horizontal trocknen, Druckseite nach oben Belichten, auswaschen 3. Extra dicke Filmschablonen für Lötpaste, abziehbare Lötmasken und sehr hohe Farbaufträge bis zu 400 Mikrons (Giessmethode) Gewebe entfetten Von jeder Seite einmal beschichten; trocknen Rahmen unten und oben mit Klebband abdecken Linke und rechte Rahmenseite: Mit Plastikstreifen, ca. 3 cm breit, die für das Giessen benötigte Dicke auftragen (Schablonendicke x 3,5 = Dicke) FOTECOAT 1834 auf das obere Klebband leeren. Einen Glas- oder Chromstahl Stab mit 8 - 10 mm Durchmesser auf die Plastikstreifen auflegen und den Stab in einer Bewegung langsam nach unten ziehen und so die Emulsion gleichmässig in der gewünschten Dicke aufgiessen (Stab nicht drehen - Luftblasen!) FOTECO

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Klebband und Plastikstreifen entfernen In horizontaler Lage trocknen, Schicht nach oben, zuerst bei 20 – 30°C, an schliessend bei max. 40°C Belichten Rahmen in lauwarmes Wasser einlegen und erst anschliessend mit Druck und kaltem Wasser auswaschen; trocknen Die Entschichtung geschieht am besten durch Einweichen im Bad und anschliessende Hochdruckentschichtung unter Verwendung der üblichen Chemikalien 4. Dicke Schablonen auf Gewebe über 55T bis zu 50 Mikrons ohne Zwischentrocknung Gewebe entfetten Beschichten: 2x Druckseite 2x Rakelseite Abziehen Mehrere Beschichtungen von der Rakelseite ohne Zwischentrocknung Trocknen, belichten, mit Kaltwasser auswaschen, trocknen 5. Hochqualitätsschablonen auf feine, gefärbte Gewebe ungefähr 15 Mikrons auf 120T Gewebe entfetten Beschichten: 1x Druckseite 1x Rakelseite Trocknen Bei 100 cm Abstand mit 5 KW Metallhalogen Lampe 15 Sekunden belichten Auswaschen, trocknen

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FOTECOAT 1834 SOLO 3. Hinweise FOTECOAT 1834 ist bereits lichtempfindlich; Je nach Schablonen-Herstellungsmethoden können Schablonendicken unter dem Gewebe von 4-400 Mikrons erzielt werden. Die Auflösung ist sehr gut; die Randschärfe aussergewöhnlich gut; auf ein 120T Gewebe kann mit 8 Mikrons Schablonendicke eine flachliegende Schablone erzielt werden. Die Lösemittelbeständigkeit ist gut. Es empfiehlt sich jedoch immer, zuerst einen Test vorzunehmen. Falls sehr grobe Gewebe verwendet werden, ist es empfehlenswert, von der Rakelseite eine oder mehrere Schichten nach der Trocknung aufzubringen, um die Maschen aufzufüllen. Dies hilft auch mit, um die gewünschte totale Schablonendicke zu kontrollieren und zu korrigieren, um genau die gewünschte Dicke zu erzielen. Die Belichtungszeit muss in solchen Fällen verlängert werden

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4. Belichtung Die Belichtungszeit hängt von der Distanz, der Lichtquelle und der Lichtqualität ab. Spektrale Empfindlichkeit: 280 - 380 nm.

Mesh

Gewebe dicke (µm)

Schablonen dicke (µm)

Totale Dicke (µm)

P 32T W

210

P 12T W

440

360

P 32SL G

100

VA 80 Stahl

Trocknungszeit Stunden

Belichtung MH (5 kW, 1m, *)

Belichtung MH (5 kW, 1m, **)

260

30 sek

40 sek

800

2-3

8 min

9 min

120

220

1-2

3 min

5 min

100

120

220

1-2

5 min

7 min

VA 80 Stahl

100

400

500

2-3

7 min

8 min

P 62T W

115

145

20 sek

30 sek

P 120T G

normal

15 sek

P 120T G

normal

15 sek

W = weisses Gewebe; G = gefärbtes Gewebe 1) Maschen von der Rakelseite nicht aufgefüllt 2) Maschen von der Rakelseite aufgefüllt

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FOTECOAT 1835 SOLO

(Water Resistant) Ready-to-use presensitized screen emulsion for the production of extra thick stencils.

Suitable for the following print media: plastisols, thermoplastics, silicones, textile inks, aqueous inks and adhesives, granulates, glitter, frit, special inks for the ceramic tile printing, 3-D (high density) printing on jeans, baseball caps and T-shirts. FOTECOAT 1835 SOLO has many unusual aspects and must be used by following the described processing technique. FOTECOAT 1835 SOLO should be coated on synthetic fabric numbers from 8 - 54 / cm or on equivalent stainless steel meshes.

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FOTECOAT 1835 SOLO can be coated wet in wet by hand or machine. It’s possible to apply between 5 to 20 strokes from the squeegee side. No mask or frame build up is necessary. The final stencil thickness depends entirely on the number of strokes from the squeegee side. Stencil thicknesses of approx. 100 - 2000 microns proud of the mesh can be achieved, depending on fabric type and number. To achieve high quality, bubble free stencils, the following coating technique is necessary: by hand 2 coats print side, 2 coats squeegee side wet in wet Scrape well off from both sides Apply the needed number of coats from the squeegee side only, all wet in wet by machine 2 coats print side alone As many coats as necessary from the squeegee side only All wet in wet The tables under point 9 explain the context between mesh, stencil thickness, drying time, exposure and wash-out. 1. Description

Presensitized polymer screen emulsion, water resistant Colour: dark, high contrast purple Solids content: 58 % Viscosity: extra thick – similar to putty Degassing is very slow because of the high viscosity; avoid stirring Should FOTECOAT 1835 SOLO become cold (transportation, refrigeration), the viscosity will increase; make sure it reaches at least 25°C before coating or warm up the emulsion in a water bath

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FOTECOAT 1835 SOLO

(Water Resistant) Ready-to-use presensitized screen emulsion for the production of extra thick stencils.

2. Stencil making under yellow or tungsten light A. B. C. D. E. F. G.

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H. I. J. K.

Degrease and dry mesh in the usual way. Use a standard trough (1,0 mm lip radius) for coating by hand or machine. Coat very slowly; coating sequence see page 1. Important: Dry first with print side down for approx. 15 min. then finalize drying with print side upwards. Important for coarse meshes! Temperature of circulating air: maximum 30°C (86°F) to avoid skin forming. Drying time: The best is to let the stencil dry over night. It must be completely through-dried before exposure. As long as the stencil has a light colour, it is not yet completely dry. The dried stencil must have a dark purple colour. Exposure: A step wedge based on the information under point 9 is necessary. Only high intensity light sources should be used. Wash-out: The exposed stencil must be immersed in lukewarm water; then use a good spray to open the unexposed area. In this condition the stencil is soft and must be treated carefully and without high pressure. See table 9.1. Make ready: Let the stencil dry and block the surrounding open mesh area with tape or water resistant emulsion. Stencil cleaning: FOTECOAT 1835 SOLO is a water resistant emulsion; cleaning with white spirit or mild solvents only. Stencil removal: Immerse in a strong concentration of stencil remover until it breaks off. (FOTECHEM 2042 diluted with water 1:10). Then brush with remover liquid (if necessary) and finally rinse thoroughly with a mild water spray before using the high pressure gun Or use standard remover and apply from squeegee side only, then peel away the thick stencil from the mesh and rinse with water pressure.

CLEAN-MIX is NOT recommended. 3. stencil quality Stencil thickness: It is important to realize that the mesh type, the mesh number, the thread diameter, the weave and the colour, together with the trough lip radius, the coating speed and the number of strokes applied control the repeatability and the effective thickness. Tests are necessary Fabric stretching: Thick stencils have tendency to become brittle. Maintain screen tension at 30 N/cm or higher in order to ensure that the mesh will snap-off and release the ink in a slow and controlled manner Stencil opening/resolution: Thumb rule: 3 x total stencil thickness = minimal stencil opening Example: stencil thickness 500 μm x 3 = line width minimum 1500 μm Stencil edge sharpness / definition • The bridging of the mesh is excellent. Practically no crow feet • The stencil shoulder is crisp and corresponds closely with the film positive • The stencil opening however is conical (smaller in the mesh) with the result that printing becomes more difficult because of obstructed ink flow • By increasing the distance between lamp and vacuum frame and adapting the exposure time, the conical structure can be reduced Dyed mesh allows to achieve residue-free, crisp mesh openings

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FOTECOAT 1835 SOLO

(Water Resistant) Ready-to-use presensitized screen emulsion for the production of extra thick stencils.

4. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct a light. Protect also against freezing. Condition

Service Life

Pre-coated screens in total darkness at 20ºC

2-3 weeks

Unsensitized, 18-25ºC storage

2 years

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5. Exposure Light source: Necessary is a high light intensity in the wave length of 340-400 nm. Metal halide lamps need a photopolymer bulb (not diazo or gallium); the type of instant starter (without shutter system) is generally well suited. Mercury vapour lamps need very long exposure times. Fluorescent tubes are not recommended The metal halide bulb should have less than 500 operating hours Distance light source to vacuum frame: to reduce the exposure time for thick stencils a reduction from 100 cm down to 80 cm can be of advantage. This results in approx. 35% shorter exposure time. The conical structure however increases It is essential to make first a test exposure (step wedge) to find the optimum exposure time in relation with the mesh colour, the number of threads, the thread diameter, the weave and the coated stencil thickness Mesh

Thumb Rule

Example Exposure: 1000 µm

White

33% (1/3 of EOM)

5-6 minutes

Dyed

50% (1/2 of EOM)

8-9 minutes

Steel

100% (total EOM)

16-18 minutes

6. washout/developing Because of the high stencil thickness special processing is necessary The exposed stencil should be immersed in lukewarm water of 25 - 30°C depending on stencil thickness A good spray only must be used to rinse the softened stencil until the reachable openings are clear Ideal is the use of a Flottmann pistol At this stage the stencil is soft and does not allow a maltreatment by excessive water pressure (maximum 20 bar) 7. Chemical hardening Use FOTECHEM 2100, 2110 or 2130 following the respective Technical Information. Hardened stencils might become very brittle. They are no longer decoatable. 8. printing The snap-off during printing should not exceed 1 mm. A sharp, hard squeegee is necessary for sharp printing.

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FOTECOAT 1835 SOLO

(Water Resistant) Ready-to-use presensitized screen emulsion for the production of extra thick stencils.

7. Chemical hardening Use FOTECHEM 2100, 2110 or 2130 following the respective Technical Information. Hardened stencils might become very brittle. They are no longer decoatable. 8. printing The snap-off during printing should not exceed 1 mm. A sharp, hard squeegee is necessary for sharp printing. 9. parameters The tables below give examples to assist in determining the number of coating strokes on various fabric numbers to achieve the wanted stencil thickness and the resulting exposure, wash-out and drying time.

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9.1. exposure, drying, washout, resolution

Mesh Count 10-270 15-250 21-150 32-100 43-80 55-70

Coating Sequence (after scrape off)

Approx. Total Stencil Thickness (Âľm)

Drying Time at 25ÂşC (hours)

Exposure Time (sec) * @ 1m White Fabric

Exposure Time (sec) @ 1m Yellow Fabric

Immersion Before Washout (minutes)

Theor. Resolution on WH Mesh

900

300

450

60-120

2700

10x

1100

360

550

60-120

3300

800

260

400

60-120

2400

10x

1000

330

500

60-120

3000

450

2.5

150

225

1350

10x

770

260

390

2300

370

125

185

1100

10x

600

3.5

200

300

1800

230

120

700

10x

360

120

180

1100

200

100

600

10x

310

1.5

105

160

1000

* with 5KW metal halide (Akticop S 3,5 KW) and photopolymer bulb 340-400 nm at 100 operating hours. 9.2. Stencil thicknesses depending on number of manual coating strokes** Approx. total stencil thickness in microns if coated after scrape off Mesh Count

12x

16x

10-270

720

830

900

1100

1250

15-250

630

720

810

900

1180

21-110

360

430

520

630

780

32-100

270

320

400

470

590

43-80

180

210

270

320

380

55-70

150

180

220

270

320

** counted after the application of 2 coats each side wet in wet followed by complete scrape off on both sides. No intermediate drying. The stencils are approx. 10% thicker after wash-out.

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1836

Ready-to-use screen emulsion for the textile screen printing with plastisoles and aqueous inks; fast exposure time

1. Description Fast, presensitized polymer screen emulsion Processing under yellow light is recommended because of the high light sensitivity FOTECOAT 1836 WR SOLO is magenta, the stencils allow excellent see-through Smaller quantities can be evacuated with the waste water Solids content 36% Can be used for printing with food products

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2. APPLICATION ADVANTAGES Can be coated on all types of meshes Medium resolution with good stencil edge sharpness Excellent print resistance Can be decoated with the usual products The chemical hardening for the production of a more resistant or permanent stencil is possible with FOTECHEM 2100, 2110 or 2130. See Technical Information To speed-up the wash out for thick stencils after exposure an immersion for 5-15 min. in a water bath is possible 3. manual and machine coating Manually the ready to use emulsion can be coated 1/1 or 1/2 wet in wet. On coarse meshes 1/1 coating is possible The viscosity is ideal for machine coating To produce a flatter stencil profile with a lower Rz-value (to improve print edge quality) additional coats can be added after an intermediate drying cycle. After each such cycle the stencil thickness increases by 1 - 2 microns and the Rz-value becomes lower After coating pour the emulsion from the coating trough into an empty can so that it can degas; this way aird bubbles can be avoided in the stencil which results in less pin-holing 4. stencil quality Excellent mesh bridging. This causes an excellent stencil edge together with medium resolution at short exposure times. A perfect stencil can be achieved on dyed mesh if the correct coating and drying technique is applied. In combination with white mesh the resolution suffers slightly The cleaning of plastisoles should be done with white spirit and not with stronger solvents

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1836

Ready-to-use screen emulsion for the textile screen printing with plastisoles and aqueous inks; fast exposure time

5. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct a light. Protect also against freezing. Storing time for coated stencils in black plastic pouches, sealed, at storing temperature of 20°C and relative humidity of 50 - 70 %: Condition

Service Life

Pre-coated screens in total darkness at 20ºC

2-3 weeks

Unsensitized, 18-25ºC storage

2 years

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6. Exposure times If metal halogen lamps are used for exposure insist on a photopolymer bulb. Do not use actinic fluorescent tubes, but only super actinic tubes, a 125 W HPR lamp or a Osram Ultra-Vitalux 300 W lamp The exposure time depends with such lamps on the number of operating hours (ca. 10 % UV light loss for 100 hours) This presensitized screen emulsion has a very high light sensitivity and allows short exposure times. Therefore the exposure latitude is narrowed. It is essential to make first a test exposure to find the optimum exposure time for the desired stencil. Longer exposure times result in better mechanical resistance and easier decoating, but have a trend to losses in the resolution Example for exposure times with 5KW MH-lamp, with photopolymer bulb at 100 cm distance: Mesh

Stencil Thickness Over Mesh

Time

120 T YE

20 µm

40 sec

77 T WH

25 µm

35 sec

43 T WH

35 µm

40 sec

(Coating technique always 1x print side, 2x squeegee side, wet in wet) If the stencil does not give the needed run lengths expose longer When working on white mesh the tendency is to underexpose. In such a case we recommend to use our product FOTECHEM 2154 (Liquid Light) during the wash-out. See Technical Information

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1836

Ready-to-use screen emulsion for the textile screen printing with plastisoles and aqueous inks; fast exposure time

7. Stencil removal

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Rule: The better the through-hardening of the stencil system by longer exposure times, the easier will be the removal. Recommended for an effective removal are: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder A preliminary degreasing cycle is recommended. The removal is always sped-up, if the printing ink is removed immediately after printing. It helps further if firstly FOTECHEM 2003 gel (degreasing agent) is applied and washed-off. This degreaser is also available as FOTECHEM 2033 concentrate; it can be diluted with 10 parts of water For the decoating cycle a high pressure water gun is always recommended. Important: always rinse the chemicals first from the stencil with a soft water spray before the high pressure gun operates Ghost pictures: After removal, the staining of the mesh or ink and stencil residues can be removed as follows: Wet the mesh first with FOTECHEM 2085 (emulsifying solvent mix), then brush-on immediately FOTECHEM 2080 alkaline paste. Let stand for maxi-mum 30 min., then rinse with a mild water spray before the ghost pictures are removed with a high pressure gun from the mesh threads. Never let the mixture FOTECHEM 2085/2080 dry in on the mesh ! Another method is the use of FOTECHEM 2089 Gel. This product contains solvents. Can be coated with the trough. Wait maximum 5 minutes, then rinse and finish cleaning with water high pressure. See Technical Information

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1837

Thick Film Stencils

FOTECOAT 1837 SOLO is very thick and somewhat easier to coat than FOTECOAT 1835 SOLO. The application technology is described in the Technical Information FOTECOAT 1835 SOLO. FOTECOAT 1837 SOLO is ready-to-use, presensitized and can be used for the production of thick stencils by the wet in wet coating method.

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FOTECOAT 1837 SOLO is pink with 52% solids and a very good water resistance. Stencils made with FOTECOAT 1837 SOLO can be used for printing all types of aqueous inks and for plastisoles as long as the stencil is not cleaned with aggressive solvents. FOTECOAT 1837 SOLO can be used on polyester and steel mesh by the manual or by the machine coating. The thickness of the stencil over the mesh (EOM) depends on the number of coats applied from the squeegee side. The following tips might be useful for the application: 1. manual coating 2x print side, 2x squeegee side, wet in wet Scrape both sides Apply the number of needed coats from the squeegee side, wet in wet 2. by machine 2x print side Coat from the squeegee side only the necessary number of layers, wet in wet 3. drying Coated screens should be dried during the first 15 minutes with print side down-wards, then turn over and finish drying at 30°C maximum 4. exposure time The following rule helps to find the correct exposure time with a 5 KW metal halide lamp at 100 operating hours and with a distance of 100 cm between vacuum frame and lamp: Mesh

Time in Seconds

White

33% of total stencil thickness

Dyed

50% of total stencil thickness

Steel

100% of total stencil thickness

Total stencil thickness means mesh thickness + EOM. It is recommended to start with a step wedge to find out the correct exposure time.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1837

Thick Film Stencils

5. developing Immerse the exposed stencil in warm water at 25–30°C. Afterwards only use a soft spray to wash-out the stencil openings. 6. decoating All commercial decoaters can be used. A high pressure gun is recommended.

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FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder Apply the decoating solution onto the squeegee side and peel off the stencil after a few minutes. Any residues can be removed by an additional application of the decoater, followed by high pressure spray. The longer the exposure, the better the through-curing of the stencil. If necessary make a post exposure. Both render the decoating easier 7. Storing FOTECOAT 1837 SOLO can be stored for at least 2 years. Protect the emulsion from freezing.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1837

Thick Film Stencils

7. Stencil removal

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FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1838

Ready-to-use screen emulsion for the textile screen printing with plastisoles and aqueous inks

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1. Description Fast, presensitized polymer screen emulsion Processing under yellow light is recommended because of the high light sensitivity FOTECOAT 1838 is magenta, the stencils allow excellent see-through Solids content 38% For long runs a small quantity of Diazo powder sensitizer can be added directly to the FOTECOAT 1838 1 sachet D2 for 4,5 kg or 1 sachet D81 for 1,0 kg FOTECOAT 1838. Use only this Diazo sensitizer for direct addition without dissolving it firstly in water The Diazo sensitizer is added to the FOTECOAT 1838 and comes in form of a sachet. However FOTECOAT 1838 can be used without the addition of the Diazo 2. APPLICATION ADVANTAGES Can be coated on all types of meshes; on white mesh the resolution/definition is satisfactory High resolution coupled with excellent stencil edge sharpness Can be decoated with the usual products The chemical hardening for the production of a more resistant or permanent stencil is possible with FOTECHEM 2100 or 2110 To speed-up the wash out for thick stencils after exposure an immersion for 5-15 min. in a water bath is possible 3. manual and machine coating Manually the ready to use emulsion can be coated 1/1 or 1/2 wet in wet. On coarse meshes 1/1 coating is possible The viscosity is ideal for machine coating. If necessary the emulsion can be diluted with water without losing light sensitivity To produce a flatter stencil profile with a lower Rz-value (to improve print edge quality) additional coats can be added after an intermediate drying cycle. After each such cycle the stencil thickness increases by 1-2 μm and the Rz-value becomes lower After coating pour the emulsion from the coating trough into an empty can so that it can degas; this way air bubbles can be avoided in the stencil which results in less pin-holing Such cycle the stencil thickness increases by 1 - 2 microns and the Rz-value becomes lower After coating pour the emulsion from the coating trough into an empty can so that it can degas; this way air bubbles can be avoided in the stencil which results in less pin-holing 4. stencil quality Excellent mesh bridging. This causes an excellent stencil edge together with medium resolution at short exposure times. A perfect stencil can be achieved on dyed mesh if the correct coating and drying technique is applied. In combination with white mesh the resolution suffers slightly The cleaning of plastisoles should be done with white spirit and not with stronger solvents

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1838

Ready-to-use screen emulsion for the textile screen printing with plastisoles and aqueous inks

5. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct actinic light. Protect also against freezing. After addition of the Diazo sensitizer the storing time at normal room conditions is reduced to 3-4 weeks Service Life

Condition Unsensitized, 18-25ºC storage

2 years

Pre-coated screens in total darkness at 20ºC

2-3 weeks

Sealed in black plastic @ 20ºC, 50-70% humidity

3 months

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Stencil Thickness Over Mesh

Time

120 T YE

20 µm

60 sec

77 T WH

25 µm

45 sec

43 T WH

35 µm

50 sec

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1838

Ready-to-use screen emulsion for the textile screen printing with plastisoles and aqueous inks

7. Stencil removal

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FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1839

For garment printing with plastisol ink, glitter printing and high-density printing

1. Description Ready to use, red photopolymer emulsion for thick stencil production Resistant to plastisol inks, water and high humidity 2. special characteristics High solids content (50%) and viscosity can produce 3´000 micron stencil thickness with simple coating procedure Exposes 10 times faster than Diazo or dual-cure emulsions Optimum elasticity

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3. Stencil making under yellow or tungsten light Using a high quality scoop coater or coating through, apply one or two coats to the substrate side of the screen, followed by one or two coats on the squeegee side For a thicker stencil, apply additional coats to the squeegee side prior to drying. See following chart for coating thickness guidelines; values in μm EOM (emulsion over mesh): Mesh

Mesh

(threads/cm)

(threads/in)

43.80 pw

110.80 pw

34.100 pw

86.100 pw

32.70 pw

81.70 pw

24.120 pw

61.120 pw

2+2 30 30 60 40

2+3 55 60 130 80

2+4 80 90 200 120

2+5 105 120 270 160

2+6 130 150 340 200

2+7 155 180

2+8 180 210

2+10 230 270

240

280

360

4. Exposure Ensure that all surfaces (emulsion, film and glass), are free of dust to minimize pinholes Contact the emulsion side of the positive with the substrate side of the screen and secure in position before placing the screen in a suitable vacuum frame Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time. Perform an exposure test with one of two calculators now available (Exposure Calculator and 21 Step Sensitivity Guide) to determinate correct exposure time for a complete cure

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

2+12 275 330

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1839

For garment printing with plastisol ink, glitter printing and high-density printing

5. Developing Wet both sides of the screen with a strong, finely divided spray of water and continue washing out until all image areas are fully open For high thickness screens, the exposed stencil should be immersed for a ½ h in lukewarm water of 25-30°C; the use of a high pressure washing system is recommended to help the development, working on print side only Rinse both sides of screen and dry thoroughly before use. A properly exposed and developed screen will not have residue on the squeegee side. 6. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct a light. Protect also against freezing. Condition

Service Life

Pre-coated screens in total darkness at 20ºC

2-3 weeks

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Unsensitized, 18-25ºC storage

2 years

7. Exposure Light source: Necessary is a high light intensity in the wave length of 340-400 nm. Metal halide lamps need a photopolymer bulb (not Diazo or gallium); the type of instant starter (without shutter system) is generally well suited. Mercury vapour lamps need very long exposure times. Fluorescent tubes are not recommended. The metal halide bulb should have less than 500 operating hours. Distance light source to vacuum frame: to reduce the exposure time for thick stencils a reduction from 100 cm down to 80 cm can be of advantage. This results in approx. 35% shorter exposure time. The conical structure however increases. It is essential to make first a test exposure (step wedge) to find the optimum exposure time in relation with the mesh colour, the number of threads, the thread diameter, the weave and the coated stencil thickness 8. Stencil removal Rule: The better the through-hardening of the stencil system by longer exposure times, the easier will be the removal. Recommended for an effective removal are: FOTECHEM 2004 liquid; FOTECHEM 2005 paste FOTECHEM 2042 concentrated liquid decoater (1:30) for machine decoating FOTECHEM 2048 is a more efficient liquid concentrate (1:30) for decoating FOTECHEM 2044 powder The longer the exposure, the better the through-curing of the stencil and the easier decoating. For the regeneration of the decoated mesh FOTECHEM 2080/2085 or 2089 can be used to remove all ink and emulsion residues; jet wash is necessary 9. health & safety Before using, refer to appropriate material safety data sheet (MSDS).

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1845

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Thick Film Stencils

Ready-to-use presensitized screen emulsion for the production of extra thick solvent resistant stencils by the wet in wet coating method Suitable for the following print media: plastisoles, Braille, gaskets, peelable solder masks and relief printing on various substrates 1845 has many unusual aspects and must be used by following the described processing technique 1845 should be coated on synthetic fabric numbers from 12-64 / cm or on equivalent stainless steel meshes 1845 can be coated by hand or machine wet in wet. It´s possible to apply between 5 to 20 strokes from the squeegee side No mask or frame build up is necessary. The final stencil thickness depends entirely on the number of strokes from the squeegee side Stencil thicknesses of approx. 100-2,000 microns proud of the mesh can be achieved, depending on fabric type and number To achieve high quality, bubble free stencils, the following coating technique is necessary: 1. Description

Presensitized polymer screen emulsion Colour: blue Solids content: 49 % Viscosity: extra thick – similar to putty Degassing is very slow because of the high viscosity; avoid stirring Should 1845 become cold (transportation, refrigeration), the viscosity will increase; make sure it reaches at least 25°C before coating or warm up the emulsion in a water bath

2. Stencil making under yellow or tungsten light A. B. C. D. E. F. G. H. I. J.

Degrease and dry mesh in the usual way. Use a standard trough (1,0 mm lip radius) for coating by hand or machine. Coat very slowly below chart shows you stencil build up with various coating methods Dry first with print side down for approx. 15 min. then finalize drying with print side upwards. Important for coarse meshes! Temperature of circulating air: maximum 30°C (86°F) to avoid skin forming. Drying time: The best is to let the stencil dry overnight. Exposure: A step wedge under 9 is necessary. Only high intensity light sources should be used. Washout: The exposed stencil must be immersed in lukewarm water; then use a good spray to open the unexposed area. In this condition the stencil is soft and must be treated carefully and without high pressure. Make ready: Let the stencil dry and block the surrounding open mesh area with tape or water resistant emulsion. Stencil cleaning: 1835 N is a water resistant emulsion; cleaning with white spirit or mild solvents only. Stencil removal: apply FOTECHEM 2005 from squeegee side only, then peel away the thick stencil from the mesh and rinse with water pressure.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1845

Thick Film Stencils

Immerse in a strong concentration of stencil remover until it breaks off. (2042 diluted with water 1:10). Then brush with remover liquid (if necessary) and finally rinse thoroughly with a mild water spray before using the high pressure gun. Stencil removal can also be done by application of the remover paste or solution on the squeegee side. After a few minutes the film can be peeled off from the print side and emulsion residues can be removed with a second application on both sides. CLEAN-MIX is NOT recommended.

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3. stencil quality Stencil thickness: It is important to realize that the mesh type, the mesh number, the thread diameter, the weave and the colour, together with the trough lip radius, the coating speed and the number of strokes applied control the repeatability and the effective thickness. Tests are necessary Fabric stretching: Thick stencils have tendency to become brittle. Maintain screen tension at 30 N/cm or higher in order to ensure that the mesh will snap-off and release the ink in a slow and controlled manner Stencil opening/resolution: Thumb rule: 3 x total stencil thickness = minimal stencil opening Example: stencil thickness 500 μm x 3 = line width minimum 1500 μm Stencil edge sharpness / definition • The bridging of the mesh is excellent. Practically no craw feet • The stencil shoulder is crisp and corresponds closely with the film positive • The stencil opening however is conical (smaller in the mesh) with the result that printing becomes more difficult because of obstructed ink flow • By increasing the distance between lamp and vacuum frame and adapting the exposure time, the conical structure can be reduced Dyed mesh allows to achieve residue-free, crisp mesh openings 4. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct a light. Protect also against freezing. Condition

Service Life

Pre-coated screens in total darkness at 20ºC

6 weeks

Unsensitized, 18-25ºC storage

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

2 years

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1845

Thick Film Stencils

5. Exposure See examples under section 9 Light source: Necessary is a high light intensity in the wave length of 340-400 nm. Metal halide lamps need a photopolymer bulb (not Diazo or gallium); the type of instant starter (without shutter system) is generally well suited. Mercury vapour lamps need very long exposure times. Fluorescent tubes are not recommended. The metal halide bulb should have less than 500 operating hours. Distance light source to vacuum frame: to reduce the exposure time for thick stencils a reduction from 100 cm down to 80 cm can be of advantage. This results in approx. 35% shorter exposure time. The conical structure however increases. It is essential to make first a test exposure (step wedge) to find the optimum exposure time in relation with the mesh colour, the number of threads, the thread diameter, the weave and the coated stencil thickness

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Example with 3.5 kW Akticop S metal halide lamp at 100 operating hours, 1m distance Condition

Time

1000 µm EOM exposure time

white mesh, per 100 µm EOM

1 minute

10 minutes

yellow mesh, per 50 µm EOM

1 minute

20 minutes

steel mesh, per 30 µm EOM

1 minute

33 minutes

6. washout/developing Because of the high stencil thickness special processing is necessary The exposed stencil should be immersed in lukewarm water of 25 - 30°C depending on stencil thickness A good spray only must be used to rinse the softened stencil until the reachable openings are clear Ideal is the use of a Flottmann pistol At this stage the stencil is soft and does not allow a maltreatment by excessive water pressure (maximum 20 bar) 7. Chemical hardening Do not harden FOTECOAT 1845 SOLO chemically. A post-exposure does not offer advantages. 8. printing The snap-off during printing should not exceed 1 mm. A sharp, hard squeegee is necessary for sharp printing. Stretch the mesh with at least 30 Newton. Avoid wooden frames. 9. parameters The tables below give examples to assist in determining the number of coating strokes on various fabric numbers to achieve the wanted stencil thickness and the resulting exposure, wash-out and drying time.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1845

Thick Film Stencils

9.1. exposure, drying, washout, resolution * with 5KW metal halide (Akticop S 3,5 KW) and photopolymer bulb 340-400 nm at 100 operating hours.

Mesh Count 10-270 15-250 21-150 32-100

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43-80 55-70

Coating Sequence (after scrape off)

Approx. Total Stencil Thickness (Âľm)

Drying Time at 25ÂşC (hours)

Exposure Time (sec) * @ 1m White Fabric

Exposure Time (sec) @ 1m Yellow Fabric

Immersion Before Washout (minutes)

Theor. Resolution on WH Mesh

460

920

60-120

2700

600

1200

60-120

3300

550

330

660

60-120

2400

950

570

1140

60-120

3000

400

2.5

240

480

1350

575

345

690

2300

250

150

300

1100

375

3.5

225

450

1800

200

120

240

700

10x

275

165

330

1100

175

105

210

600

250

1.5

150

300

1000

700

1000

10x 5x 10x 5x 10x 5x 10x 5x

10x

9.2. Stencil thicknesses depending on number of manual coating strokes** Approx. total stencil thickness in microns if coated after scrape off Mesh Count

12x

16x

10-270

680

15-250

500

21-110

300

32-100

220

43-80

160

55-70

130

** counted after the application of 2 coats each side wet in wet followed by complete scrape off on both sides. No intermediate drying. The stencils are approx. 10% thicker after wash-out.

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

Thick Film Stencils FOTECOAT 1846 SOLO FOTECOAT 1846 SOLO has a high viscosity between FOTECOAT 1845 SOLO and 1847 SOLO. The usage of this screen emulsion is described in “Technical Information FOTECOAT 1845 SOLO”. FOTECOAT 1846 SOLO is ready to use, presensitized and usable for the production of thick stencils by the wet in wet coating method.

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FOTECOAT 1846 SOLO is blue and has a solid content of 44% coupled with a very good solvent resistance. A post-exposure improves the curing whereas a chemical hardening increases the water resistance. FOTECOAT 1846 SOLO can be applied on polyester meshes from 21 to 77 by manual or machine application. The stencil thickness over the mesh depends on the number of coats from the squeegee side (and naturally on the mesh number). For the application the following hints should be considered: 1. Manual Coating 2x printing side, 2x squeegee side wet in wet Scrape from both sides Apply the necessary number of coats from the squeegee side, wet in wet

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

Thick Film Stencils FOTECOAT 1846 SOLO 2. by machine 2x printing side Apply the necessary number of coats from the squeegee side, wet in wet The drying should be done with the print side downwards during the first 15 minutes, afterwards turn the screen with the print side upwards and dry at the maximum tem-perature of 30°C. The exposure time with a 5 kW metal halide lamp at 100 cm distance to the vacuum frame can be calculated as follows: On white mesh for every 100 micron total stencil thickness (thickness of the mesh + stencil thickness over the mesh) = 1 minute; on yellow mesh 1 minute and 40 seconds. It is recommended to make a test exposure with a step wedge to find out the correct exposure time.

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The wash-out should be done as follows:

Immerse the exposed stencil in a water bath at 25 – 30°C Then spray with a good water jet the softened parts of the openings until they are clear An excellent tool to wash-out adequately is the Flottmann water pistol A very high water pressure should be avoided because the stencil is relatively soft during the wash-out process

The chemical hardening with FOTECHEM 2100, 2110, 2113 or 2130 is possible by following our Technical Informations. Chemically hardened stencils become brittle. They can no longer be reclaimed. The reclaiming can be done with the usual FOTECHEM decoating products. Storing time is 2 years.

FOTECO

A SAATI BRAND

SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

Thick Film Stencils FOTECOAT 1847 SOLO FOTECOAT 1847 SOLO has a lower viscosity than FOTECOAT 1846 SOLO. The usage of this screen emulsion is described in “Technical Information FOTECOAT 1845 SOLO”. FOTECOAT 1847 SOLO is ready to use, presensitized and usable for the production of thick stencils by the wet in wet coating method.

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FOTECOAT 1847 SOLO is blue and has a solid content of 42% coupled with a very good solvent resistance. A post-exposure improves the curing whereas a chemical hardening increases the water resistance. FOTECOAT 1847 SOLO can be applied on polyester meshes from 32 to 90 by manual or machine application. The stencil thickness over the mesh depends on the number of coats from the squeegee side (and naturally on the mesh number). For the application the following hints should be considered: 1. Manual Coating 2x printing side, 2x squeegee side wet in wet Scrape from both sides Apply the necessary number of coats from the squeegee side, wet in wet

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Appiano Gentile, May 2014

Thick Film Stencils FOTECOAT 1847 SOLO 2. by machine 2x printing side Apply the necessary number of coats from the squeegee side, wet in wet The drying should be done with the print side downwards during the first 15 minutes, afterwards turn the screen with the print side upwards and dry at the maximum tem-perature of 30°C. The exposure time with a 5 kW metal halide lamp at 100 cm distance to the vacuum frame can be calculated as follows: On white mesh for every 100 micron total stencil thickness (thickness of the mesh + stencil thickness over the mesh) = 1 minute; on yellow mesh 1 minute and 40 seconds. It is recommended to make a test exposure with a step wedge to find out the correct exposure time.

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The wash-out should be done as follows:

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

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Appiano Gentile, May 2014

FOTECOAT 1850

Presensitized, polymer, solvent resistant, ready-to-coat screen emulsion

1. Description Extremely fast polymer emulsion, presensitized; free of Diazo For ink systems based on solvents Working under yellow light is recommended because of the increased light sensitivity The emulsion has a light grey-blue color; the stencil has excellent see through Harmless for sewage water and at the working place if standard industrial precautions are followed

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2. APPLICATION ADVANTAGES No mixing; does not need degassing: therefore less pinholes Best print results are achieved on dyed- and steel mesh The exposure time on dyed mesh corresponds to approximately 40% of FOTECOAT 1010 or 15% of FOTECOAT 1569 No post-exposure needed High resolution with precise stencil edge sharpness thanks to high content of solids (36%) Low viscosity for manual and machine coating Ideal for thick film stencil production Can be removed with the usual remover products 3. manual and machine coating Manual: The ready-to-coat emulsion can be used by the 1/2 or 2/2 technique The viscosity is ideal for coating machines To produce a flatter stencil profile and a lower Rz-value - to improve the print edge sharpness - additional coatings are possible after intermediate drying. The stencil thickness increases by 1-2 microns and the Rz-value is lowered with each additional coat onto the dried surface If the emulsion is poured back into the can after coating, it will be necessary to check before the next coating if the emulsion is degassed completely; check if there are no longer air bubbles on the emulsion surface. The reason is, that like all screen-emulsions, air is sucked into the emulsion during stirring or coating. Such air bubbles are the main cause for pinholes. 4. stencil quality The excellent wet hardness and the low swelling characteristics during the wash-out produce stencils with unique mesh bridging characteristics. Therefore an excellent stencil edge sharpness is guaranteed. Coupled with the very high resolution power at short exposure times, unsurpassed quality stencils are achieved on dyed mesh or steel if the correct coating technique and drying position is used.

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

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Appiano Gentile, May 2014

FOTECOAT 1850

Presensitized, polymer, solvent resistant, ready-to-coat screen emulsion

5. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct a light. Protect also against freezing. Condition

Service Life

Unsensitized, 18-25ºC storage

2 years

Pre-coated screens in total darkness at 20ºC

4 weeks

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6. Exposure times All light sources with a spectral light output between 340-400 nm can be used Metal halogen lamps with an iron charged burner or a gallium/iron burner are ideal The loss on UV-light during the working time of the lamp must be considered (approximately 10% per 100 burning hours) This emulsion has a very high light sensitivity. The exposure latitude is therefore reduced. This needs a careful step wedge to find the optimum result in respect of exposure time. Longer exposure produces better mechanical resistance of the stencil but shows losses in the resolution Exposure time with a 5 kW MH-lamp, type Akticop 3500 S, at 100 cm distance on yellow mesh 120T-34 and 13 microns stencil build-up is approximately 20 seconds. (Coating 1x printing side, 3x squeegee side, wet in wet) White mesh is responsible for strong light scattering; the print result will suffer 7. Stencil removal The old rule is valid: The better the hardening of the stencil system through a longer exposure time, the easier the stencil removal This screen emulsion is free of Diazo. Therefore no brownish residues on the mesh; the removal of ghost images is simplified The stencil removal is simplified if the ink is removed immediately after printing. Then firstly degreasing with FOTECHEM 2003 ready-to-use or FOTECHEM 2033 Concentrate, diluted 1:10, is recommended

To speed up removal a high pressure device is recommended. Important: Hose off with soft spray first to remove the chemicals, then only use the power spray Ghost images: Brush on FOTECHEM 2085 (a blend of emulsifying solvents), then apply FOTECHEM 2080 (high alkaline paste) with a brush; let stand for maximum ½ hour, then hose off with mild spray before the residues are removed with a high power spray. Increase pressure to 100 bar or higher if residues are very stubborn

FOTECO

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Appiano Gentile, May 2014

FOTECOAT 1855 UV A remarkable, unusual screen emulsion

Over 60% solids, ideal viscosity for machine coating, especially suitable for UV inks. FOTECOAT 1855 UV is blue. For many cases (posters etc.) 1 coat on the printing side will be sufficient.

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Short exposure time with metal halogen lamp. Rapid wash-out, easy to decoat.

On polyester 150-31 Y the following values can be reached with a coating trough of 1 mm radius at medium coating speed on the FOTECO machine 404.

Coating

EOM (Âľm)

Rz Value

1xP

4.6

8.7

2XP

7.4

7.8

1P/1S

6.4

7.2

1P/2S

11.0

6.7

The exposure time at 100 cm distance with a 3,5 kW Aktispeed metal halogen lamp is 25â&#x20AC;&#x201C;30 seconds. The stencil removal can be done with the usual screen chemicals

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

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Appiano Gentile, May 2014

FOTECOAT 1860

Presensitized, polymer, solvent resistant, ready-to-coat screen emulsion

1. Description Fast, presensitized emulsion ready-to-coat; free of Diazo Completely solvent resistant and very easy to decoat Available in green or purple color with high contrast Solids content 35%; high viscosity Economic to use Harmless for sewage and at the working place

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2. APPLICATION ADVANTAGES No mixing; does not need degassing: therefore less pinholes Best printing results are reached on dyed polyester and on steel mesh Good resolution and stencil edge sharpness Can be easily removed with the usual products Thanks to the mat stencil surface static problems can be avoided 3. manual and machine coating Manual: The ready-to-coat emulsion can be used by the 2/3 technique. Because of the high viscosity of this emulsion the same technique can be used for coarse mesh The viscosity is ideal for coating machines. If necessary the emulsion can be thinned with water without losing light sensitivity To produce a flatter stencil profile and a lower Rz-value - to improve the print edge sharpness - additional coatings are possible after intermediate drying. The stencil thickness increases by 1-2 microns and the Rz-value is lowered with each additional coat onto the dried surface If the emulsion is poured back into the can after coating, it will be necessary to check before the next coating if the emulsion is degassed completely; check if there are no longer air bubbles on the emulsion surface. The reason is, that like all screen emulsions, air is sucked into the emulsion during stirring or coating. Such air bubbles are the main cause for pinholes 4. stencil quality Thanks to high solids content and the perfect viscosity an excellent mesh bridging is reached. The edge definition is reasonably good. Coupled with high resolution characteristics and the short exposure time excellent stencils on both dyed and white mesh or on steel mesh can be produced if an adequate coating technique is used. On white polyester the definition is somewhat lower and the exposure latitude decreases.

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392

TECHNICAL INFORMATION

Appiano Gentile, May 2014

FOTECOAT 1860

Presensitized, polymer, solvent resistant, ready-to-coat screen emulsion

5. storing This ready-to-coat emulsion should be stored in a closed can, protected from direct a light. Protect also against freezing. Condition

Service Life

Unsensitized, 18-25ºC storage

2 years

Pre-coated screens in total darkness at 20ºC

4 weeks

Coated, packed in black plastic, 20°C, 50-70% relative humidity

6 months

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6. Exposure times Light sources with a spectral light output between 320 - 380 nm can be used Metal halogen lamps with a photopolymer bulb are ideal for FOTECOAT 1860 The loss on UV-light during the working time of the lamp must be considered (approximately 10% per 100 burning hours) This emulsion has a high light sensitivity. The exposure latitude is therefore re-duced. This needs a careful step wedge to find the optimum result in respect of ex-posure time. Longer exposure produces better mechanical resistance of the stencil but shows losses in the resolution Exposure time with a 5 kW MH-lamp, gallium-iron charged burner, at 100 cm distance on yellow mesh 120T-34 and 14 microns stencil build-up is approximately 40 seconds. (Coating 2x printing side, 3x squeegee side, wet in wet.) White mesh causes a stronger undercutting of the light. On 120T-34 white at 14 microns stencil thickness approximately 20 seconds exposure time are needed If fluorescent tubes are used we recommend only super actinic (solarium) tubes The Philips HPR-125 W lamp is an adequate light source if the stencil is covered during the 4 minutes warm-up time of the lamp 7. Stencil removal The old rule is valid: The better the hardening of the stencil system through a longer exposure time, the easier the stencil removal This screen emulsion is free of Diazo. Therefore no brownish residues on the mesh; the removal of ghost images is simplified The stencil removal is simplified if the ink is removed immediately after printing. Then firstly degreasing with FOTECHEM 2003 ready-to-use or FOTECHEM 2033 Concentrate, diluted 1:10, is recommended

The stencil removal is simple and fast without high pressure gun Ghost images: Brush on FOTECHEM 2085 (a blend of emulsifying solvents), then apply FOTECHEM 2080 (high alkaline paste) with a brush; let stand for maximum 1hour, then hose off with mild spray before the residues are jetted off with a high power spray. Do not let dry on the mesh. Or use FOTECHEM 2089 (one component) and apply by coating trough.

FOTECO

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SAATI S.p.A. | Via Milano 14 | 22070 Appiano Gentile (CO) Italy Phone +39.031.9711 | Fax +39.031.933392