PRE-PRESS EMULSIONS
PRE-PRESS
TOPICS DIAZO-TRADITIONAL PHOTOEMULSIONS DUAL-CURE PHOTOEMULSIONS PURE POLYMER PHOTOEMULSIONS AUXILIARIES
PRE-PRESS
DIAZO-TRADITIONAL PHOTOEMULSIONS Diazo-traditional photoemulsions are based on the photo-chemical reaction between the activator – a diazo-compound – and the photo-sensitive emulsion by UV radiation. The equipment is fundamental to achieve a correct screen matrix as well as the right exposure and the appropriate light source used.
PRE-PRESS DIAZO-TRADITIONAL PHOTOEMULSIONS ORANGE 204 SOLVENT RESIST Diazo-traditional photoemulsion with violet colour. It has been developed for the preparation of screen matrices to be used with solvent based and UV inks. RESISTANCES UV
SOLVENT
MECHANICAL
ABRASION
9
9
7
7
RESOLUTION
DEFINITION
LATITUDE
RECOVERY
SOLID CONTENT
7
7
6
8
29%
FEATURES
Key: 1=minimum 10=maximum
PRE-PRESS
DUAL-CURE PHOTOEMULSIONS The reaction mechanism of the dual-cure photoemulsions is based on a dual system hardening: the first is a photochemical reaction between the activator – a chemical diazo-compound – and the photo-sensitive emulsion by means of UV radiation, the second is a reaction of the acrylic resins contained in the formula. Dual-cure photoemulsions, in fact, basically contain polyvinyl acetate, polyvinyl alcohol and UV acrylic resins. These photoemulsions have to be engraved by metal-halogen lamps, with a wide spectrum and available with different power outputs, to ensure complete hardening of the film. Dual-cure photoemulsions offer short exposure time, high quality and durability of the screen matrices, exceptional image quality and greater versatility.
PRE-PRESS DUAL-CURE PHOTOEMULSIONS BLUE 401 TK WATERPROOF Dual-cure photoemulsion, with blue colour, with great versatility and excellent performances. It has been developed for the preparation of screen matrices to be used with plastisol, water-based and sublimation inks. RESISTANCES
FEATURES
WATER
SOLVENT
MECHANICAL
ABRASION
8-10
7-8
8
9-10
* Before catalysis
RESOLUTION
DEFINITION
LATITUDE
RECOVERY
SOLID CONTENT
8
8
9
SÌ*
43%
YELLOW 601 DOUBLE RESIST Dual-cure photoemulsion, with blue colour, with great versatility. It has been developed for the preparation of screen matrices to be used with plastisol, solvent-based and UV inks. RESISTANCES
FEATURES
UV
SOLVENT
MECHANICAL
ABRASION
7
7
7
7
RESOLUTION
DEFINITION
LATITUDE
RECOVERY
SOLID CONTENT
7
6
6
7
42%
PRE-PRESS DUAL-CURE PHOTOEMULSIONS YELLOW 602 DOUBLE RESIST Dual-cure photoemulsion, with violet colour. It has been developed for the preparation of screen matrices to be used with plastisol, solvent-based and UV inks. RESISTANCES
FEATURES
PLASTISOL
UV
SOLVENT
MECHANICAL
ABRASION
RESOLUTION
DEFINITION
LATITUDE
RECOVERY
SOLID CONTENT
7
8
8
7
7
8
7
7
7
42%
ORANGE 501 SOLVENT RESIST Dual-cure photoemulsion, with violet colour, with high solvents resistance and excellent response if exposed to light sources other than metal-halogen lamps. It has been developed for the preparation of screen matrices to be used with solvent-based and UV inks. RESISTANCES
FEATURES
UV
SOLVENT
MECHANICAL
ABRASION
RESOLUTION
DEFINITION
LATITUDE
RECOVERY
SOLID CONTENT
8
8
7
7
8
8
8
7
32%
PRE-PRESS
PURE POLYMER PHOTOEMULSIONS This is the “avantgard� class of photemulsions. Pure polymer photemulsions contain an SBQ compound that assures very high reactivity to UV radiation, not requiring the reaction activator (diazo-compund). In addition to SBQ the formula includes: polyvinyl acetate, polyvinyl alcohol and synthetic resins responsible for the specific resistance of the screen matrix. Pure polymer photoemulsions offer lots of advantages: fast exposure time, high engraving precision, pot-life extension and no waiting time due to activator addition.
PRE-PRESS
PURE POLYMER PHOTOEMULSIONS
YELLOW 301 Double Resist - Polimera pura YELLOW 301 DOUBLE RESIST
Pure polymer photoemulsion, with green colour, with an high solid content . It has been developed for the preparation of screen matrices for textile printing 3D effects. RESISTANCES WATER
SOLVENT
MECHANICAL
ABRASION
7
5
8
8
RESOLUTION
DEFINITION
LATITUDE
RECOVERY
SOLID CONTENT
2
7
2
4
50%
FEATURES
Key: 1=minimum 10=maximum
PRE-PRESS
AUXILIARIES In the screen matrices preparations, besides the photoemulsion choice, other processes should not be underestimated, because they remarkably influence the successful result: • an effective degreasing of the fabric, which removes the dirt allowing better adhesion of the emulsion avoiding "pinholes"; • the proper catalysis, to increase both chemical and mechanical resistances; • the right gluing of the fabric to the frame, which assures a perfect hold of the register during printing.
PRE-PRESS AUXILIARIES ADHESIVES FOR GLUING OF THE FABRIC TO THE FRAME GREEN TACK, polyurethane two-component adhesive suitable for all frame types gluing: metal (both steel and aluminium), coated-metal and wooden.
CATALYSTS GREEN FIX series is a selection of catalysts to increase matrices chemical and mechanical resistance.
STRIPPERS GREEN STRIP series, to remove photoemulsions both from screen printing matrices and fabrics.
GHOST IMAGES REMOVERS GREEN GHOST series, to remove "ghost images" from recovered fabrics.
a Business Brand by
www.eptanova.com Headquarters EPTATECH S.R.L Via A. De Gasperi, 1 22070 Luisago (CO), Italy P. +39 031 9090111 Fax +39 031 920505 info@eptatech.com
Market Companies EPTAINKS S.P.A. Via Zamenhof, 12 – 36100 Vicenza, Italy P +39 0444 914382 Fax +39 0444 918196
EPTA CHINA Chemicals Shanghai Co. Ltd. Building A12, No.5399, Waiqingsong Road Qingpu I.Z. – 201707 Shanghai, China P +86 21 69211223 – Fax +86 21 69211311
EPTA SPAIN S.L.U. Can Coll, 15 – naves 22-23 08185 Lliçá de Vall – Barcelona, Spain P +34 93 8439415 Fax +34 93 8439127
EPTA BANGLADESH Ltd. Plot-45, Gulshan South Avenue, Navana Tower Shop No. 2567 (3rd Floor) Dhaka PO 1212, Bangladesh P +880 44 78440077 80 | info@eptabd.com
EPTA FRANCIA SAS 42210 - Montrond-les-Bains 71 Rue De Boissieu P +33 04 77 61 97 54 serviceclients@eptafrancia.fr
EPTA INDIA (PVT) Ltd. No.8, 5th street, Pudhu Thottam, Sheriff Colony Tiruppur – 641 604, India P +91 421 2216988 – Fax +91 421 2213225 info@eptainks.co.in
ESAPRINT LLC (OOO) Ostashkovskaya Street 22 127224 Moscow, Russian Federation P +7 495 3800278 F +7 495 6086810 info@esaprint.ru
EPTA NORDIC OY Palloilijantie 17 90670 Oulu, Finland P +358 442377532 info@eptanordic.com
EPTALAM INDÚSTRIA, COMÉRCIO, IMPORTAÇÃO E EXPORTAÇÃO DE TINTAS LTDA. Avenida New Jersey, 1030 – Galpão 01 Aruja – SP, CEP 07400-000 P +55 114652 7831 info@eptalam.com.br