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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
Standardized gloss measurement is critical for maintaining quality across global supply chains in industries like automotive, aerospace, and consumer electronics. Core Measurement Geometries astm d523 pdf new
Used for surfaces that measure above 70 Gloss Units (GU) at the 60° angle. This geometry provides better resolution for very shiny coatings. Applied to "sheen" or matte surfaces that measure
The standard specifies three primary measurement angles (geometries) to ensure accuracy across different levels of shininess: astm d523 pdf new