gloss-meter

Models: ACM - 52302 - J

Gloss Meter

TECHNOCRACY PVT. LTD.

Models: • ACM - 52301 - J

Gloss Meter

ACMAS TECHNOCRACY PVT. LTD. www.measuring-meters.com | www.acmasindia.com | www.scientificlaboratoryequipments.com

Product Over View Weiber glossmeter measures specular reflection. The light intensity is registered over a small range of the reflection angle. The intensity is dependent on the material and the angle of illumination. In case of non-metals (coatings, plastics) the amount of reflected light increases with the increase of the illumination angle. The remaining illuminated light penetrates the material and is absorbed or diffusely scattered dependent on the color. Metals have a much higher reflection and are less angle dependent than non-metals.

Gloss Meter

Weiber glossmeter gives the amount of reflected light from a sample, compared to that reflected from a black glass calibration standard with a defined refractive index. The result is independent of the amount of incident light. The gloss value of the reference standard is defined to be 100 gloss units. Materials with a higher refractive index can have a measurement value above 100 gloss units.

For transparent materials, the gloss can be increased by multiple reflections in the bulk of the material. Due to the high reflectivity of metals, values as high as 3500 gloss units can be obtained.

For these applications it is common to use percent reflection of incident light rather than gloss units.

Gloss

Glossmeters usage procedures, as well as their defined angles of measurement, are internationally standardized to allow comparison of measurement values. Angle of illumination is the most important criterion. To clearly differentiate between high gloss and low gloss, several different measurement angles are used, with incident angles of 20, 60, and 85 degrees the most common.

The 20 degree angle is normally used for high gloss surfaces, the 60 degree angle for medium gloss surfaces, and the 85 degree angle for low gloss surfaces.

Meter

Industry Ceramics, Paper, Granite, Paints, Laminates, Plastics, Marble, Porcelain, various chemical industry and many more.

Gloss

Gloss Difference Viewed By Human Eye If two different coatings are measured, what number of gloss units would be detectable by the human eye, how many units would be perceived as significantly different?

When measuring at 60 Degrees these detectable differences depend on the gloss level of the sample, for instance 3.0 GU difference measured on a very matte surface (perhaps 5GU), would be seen by the human eye but on a higher gloss coating (perhaps 60 GU) the difference would be very difficult to notice.

Meter

The only way that you can determine tolerances for your products would be experimentally, perhaps preparing printed samples at different gloss levels that you can show to end users of your coatings or internal "experts".

The other option is to change to a 20/60/85 degree instrument, the 85 degree glossmeter is more sensitive to differences in gloss below 10 GU @ 60째 and the 20 Degrees has higher resolution on high gloss coatings (above 70 GU @ 60째). The advantage of using the three angles is that there is more equality to the gloss differences, in our experience a gloss difference

Gloss

Gloss Meter Applications in Industry Many industries measure gloss to ensure the quality of their products. It has been shown that the gloss level of a product has as much psychological impact on a consumer as its colour. Many products are designed with combinations of high gloss and matt finishes, maximizing their customer appeal.

Meter

Surface quality can often be assessed by measuring gloss. For example poorly cured paints or coatings can exhibit unusual gloss levels and can lead to chipping and flaking at a later stage in manufacture. Monitoring a product's gloss means that problems such as these can be highlighted early, avoiding costs of re-coating or recalling products.

Gloss

APPLICATION 20°

60°

85°

Coatings, plastics and related materials

High Gloss

Meter

Semi Gloss

Low Gloss

45°

75°

Ceramic,

Paper,

Film

Vinyl

Semi Gloss

Low Gloss

Working Principle Gloss is measured by shining a known amount of light at a surface and quantifying the reflectance.

The angle of the light and the method by which the reflectance is measured are determined by the surface. Gloss is measured using a Gloss Meter which directs a light at a specific angle to the test surface and simultaneously measures the amount of reflection. The type of surface to be measured determines the gloss meter angle to be used and thus the gloss meter model. The intensity is

Gloss

dependent on the material and the angle of illumination. In case of nonmetals (coatings, plastics) the amount of reflected light increases with the increase of the illumination angle. The remaining illuminated light penetrates the material and is absorbed or diffusely scattered dependent on the color.

Metals have a much higher reflection and are less angle dependent than non metals. The measurement results of a gloss meter are related to the amount of reflected light from a black glass standard with a defined refractive index, and not to the amount of incident light. The measurement

Meter

value for this defined standard is equal to 100 gloss units. Materials with a higher refractive index can have a measurement value above 100 gloss units (GU), e.g. films.

In case of transparent materials the measurement value can be increased due to multiple reflections in the bulk of the material. Due to the high reflection capabilities of metals values of up to 2000 GU can be reached. For these applications it is common to document the measurement

Gloss

results in % reflection of the illuminated light. Gloss meters and their handling procedures had to be internationally specified to allow comparison of measurement values. The angle of illumination is of high influence. In order to obtain a clear differentiation over the complete measurement range from high gloss to mat, 3 different geometries, i.e. 3 different ranges, were defined using a 60° gloss meter.

Gloss Range with 60° Gloss Meter

Measure With:

If Semi Gloss - 10 to 70 GU

60 °

If High Gloss > 70 GU

20 °

If Low Gloss < 10 GU

85 °

Meter

Product Specifications "Weiber Glossmeter is a compact, portable, sensitive & accurate instrument

handy battery

operated for the measurement of different geometry 20 deg., 60 deg., 85deg etc.

The above instruments can be used for the measurement of gloss/brightness of paints, opaque glasses, plastics, ceramics, porcelains, paper, cloths, pigments, flours, powder etc. This instrument is also useful to measurement of Brightness/whiteness of Plantation white sugar & measurement of reflectance of fabrics.

Gloss

Technical Specification

Meter

Range

0 - 99.9 gloss units

Angle heads

20,60, 85 degree

Accuracy

.1 unit

Power Supply

9V battery,

Display

3-1/2 LED

Sensor

V(x) Silicon Photodiode

Light Source

Specially designed lamp

Standards

Black, White tile

Filters

optional

TECHNOLOGY with

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h HUMAN TOUCH TECHNOCRACY PVT. LTD.

Gloss Meter

An ISO 9001:2208 | ISO 14001:2008 | ISO 13485 WHO:GMP Products | GLP Compliant Products

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