Glossmeters must be calibrated using a polished black glass tile (the standard) before every use to maintain accuracy. Industry Significance
High-gloss magazine covers versus matte book jackets. Printers rely on 60° and 85° geometries per ASTM D523 to match customer proofs. astm d523 pdf new
The ASTM D523 standard test method covers the measurement of specular gloss of surfaces at 20°, 60°, and 85° angles of incidence. The test method is applicable to a wide range of surfaces, including: Glossmeters must be calibrated using a polished black
"He lists the standard as 1.540," Elena said, a smile touching her lips. "It’s a small number, but in the world of gloss, it’s a mile. He measured a mirror using a window pane." The ASTM D523 standard test method covers the
angle for most specimens. Used to determine if other angles are needed. 10 to 70 units 20° For High-Gloss surfaces where the 60° reading is above 70. > 70 units 85°
ASTM D523 is a standard test method that covers the measurement of the specular gloss of coatings using a goniophotometer or a specular glossmeter. The standard provides a procedure for measuring the gloss of paint coatings at 20°, 60°, and 85° angles of incidence. The test method is widely used to evaluate the appearance of paint coatings and to ensure that they meet the required specifications.
(and its immediate predecessor D523-14R18) emphasizes several critical factors for accuracy: D523 Standard Test Method for Specular Gloss - ASTM