Astm D523 Pdf -

5.1 : A glossmeter is used to measure the specular gloss. The instrument consists of a light source, a receptor (or detector), and a scale to read the gloss value.

1.1 This test method covers the measurement of the specular gloss of non-metallic painted surfaces only, such as painted metal, plastic, and wood. 1.2 This test method is designed to measure the specular gloss of surfaces at specified angles of illumination and view. astm d523 pdf