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ASTM D523: Standard Test Method for Specular Gloss

specimens (typically those measuring below 10 GU at 60°) or for measuring "sheen". New ASTM Digital Rights Management (DRM) Policy astm d523 pdf new

• 20° Geometry: High-gloss surfaces (e.g., automotive clear coats, mirrors)
• 60° Geometry: Universal/Intermediate gloss (general paint and plastics)
• 85° Geometry: Low-gloss or matte surfaces (e.g., paper, flat paints, textiles)

The gloss of a paint coating is an essential characteristic that affects its appearance and performance. High-gloss coatings tend to be more reflective and have a more uniform appearance, while low-gloss coatings are less reflective and may appear more matte. The measurement of gloss is critical in various industries, including: ASTM D523: Standard Test Method for Specular Gloss