Gray Scale Determination

This test method is used to determine optical surface changes induced by various stresses.

These stresses can include processing, after-treatment, light aging, weathering and temperature aging. The difference in color between a specimen that has been exposed to light and an unexposed specimen is compared with the gray scale sections. The light-exposed specimen is given the number closest to the color fastness level on the gray scale.

Test specimen Sample sheet
Basic dimensions 60 mm x 40 mm x d

 

Gray scale for determining color differencesGray scale for determining color differences

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