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Gloss measurement of coating films

The spatial distribution of reflected light determines the gloss of a coating film surface. Matte coating film surfaces scatter incident light completely over the half-space above them. High-gloss surfaces that have not been textured in the microscale reflect light as if in a mirror.

Diffuse light scattering from the pigments occurs in the matte area of pigmented coating films, so dark coating films automatically appear glossier due to the reduced pigment scattering. The angle of observation is decisive for assessing gloss, because the gloss of a coating film surface depends decisively on the amount of directionally reflected light.
With arbitrarily selected irradiation angles of 60 degrees, 20 degrees and 85 degrees, the gloss areas of coatings can be detected well. However, this method is not suitable for luminescent or metal-pigmented coatings - for these, goniophotometers are much more suitable for measuring the angular distribution of the reflected light.

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WIOTEC® Ense GmbH & Co. KG
Auf den Geeren 9-11
59469 Ense-Höingen, Germany

WIOTEC® Arnsberg GmbH & Co. KG
Wagenbergstraße 55
59759 Arnsberg, Germany

+49 2938 97833-0
+49 2938 97833-20

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