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.

If you need to learn more about gloss measurement or need help with testing to ASTM standards, consult relevant industry professionals or resources.

10.1 The gloss value is reported as a numerical value.