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.
The new procedure explicitly warns against measuring through protective film or glass. It also adds a mandatory check for "drift" after every 10 measurements.
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The reading wasn't 92 GU. It was 68 GU.
of non-metallic materials like paints, plastics, and coatings. Quick Reference: The Three Geometries
What “new” might mean
If the initial 60-degree reading exceeds 70 GU , the material is high-gloss. You must re-test the sample using the 20-degree geometry to get a more accurate evaluation. 3. The 85-Degree Geometry (For Low-Gloss/Matte Surfaces) astm d523 pdf new
Invest in the official, new ASTM D523 PDF from ASTM International or an authorized reseller. It costs less than a single non-conformance report in a factory audit. Keep it on your document control system, train your technicians on its updated procedures, and your gloss measurements will be globally valid, defensible, and accurate.
Ensure the specimen surface is clean, dry, and flat.
If you have arrived here searching for an , you are likely looking for the definitive standard on how to measure the gloss of a surface. Whether you are in quality control, automotive manufacturing, or the coatings industry, ASTM D523 is the benchmark procedure for ensuring surface consistency. ASTM D523 is a standard test method that
The standard specifies three primary measurement angles to ensure high resolution across different levels of shininess: 60∘60 raised to the composed with power
Is your product surface achieving that perfect, eye-catching finish? Whether it’s a high-gloss luxury car part or a matte, tactile packaging design, shine is often perceived as synonymous with quality.