The latest standard for measuring specular gloss is ASTM D523-25
: Applied when the 60° reading is higher than 70 units. It provides better resolution for very shiny surfaces. 85° (Matte/Low Gloss) astm d523 pdf new
, which was reapproved in 2018 to ensure its continued technical relevance. ASTM International Core Measurement Geometries The latest standard for measuring specular gloss is
"I did. Three times," Marcus said. "I calibrated the tile twice. It keeps coming back too high. It’s impossible for a fifty-year-old lacquer." astm d523 pdf new