Comprehensive Guide to the ASTM D523-25 Standard for Specular Gloss
Applied to "sheen" or matte surfaces that measure below 10 GU at the 60° angle. This grazing angle is more sensitive to differences in low-gloss textures. How Specular Gloss is Measured astm d523 pdf new
The standard starting point for all finishes. It is used to categorize a surface before more specialized testing. Comprehensive Guide to the ASTM D523-25 Standard for
The latest version of the primary international standard for measuring surface shininess is , approved in June 2025 . This standard defines a rigorous methodology for quantifying "specular gloss"—the ability of a nonmetallic surface to reflect light in a mirror-like direction. It is used to categorize a surface before
Standardized gloss measurement is critical for maintaining quality across global supply chains in industries like automotive, aerospace, and consumer electronics. Core Measurement Geometries
The standard specifies three primary measurement angles (geometries) to ensure accuracy across different levels of shininess: