Astm D523 Pdf New Online
When a 60° measurement yields a gloss value higher than 70 GU, the surface is highly reflective. Switching to the 20° geometry provides enhanced contrast and better differentiation between highly reflective samples (e.g., automotive clear coats or polished metals). 3. The 85° Geometry (The Low-Gloss/Matte Angle) Target Surfaces: Low-gloss or matte materials.
Specular gloss refers to the ability of a surface to reflect light in a "mirror-like" direction. ASTM D523 provides a standardized way to quantify this using a , which compares the light reflected from a test specimen to that from a primary black glass standard. Technical Measurement Geometries
ASTM D523 allows manufacturers to:
Because ASTM documents are protected by intellectual property laws, official and legal copies of the newest ASTM D523 PDF must be purchased directly from authorized distributors. You can find the active standard through:
No. The new ASTM D523 PDF explicitly states: Use 60° for general evaluation. If the reading is >70 GU, use 20°. If <10 GU, use 85°. astm d523 pdf new
Calibrate the gloss meter using the polished black glass reference standard provided by the manufacturer. This standard typically reads close to 100 GU at all three angles. Verify the lower baseline using a secondary matte reference tile. Step 4: Taking Measurements
When you search for , you are not just looking for a file—you are looking for authority and accuracy . When a 60° measurement yields a gloss value
The Definitive Guide to ASTM D523: Understanding the Standard Test Method for Specular Gloss
Evaluating the surface finish of molded consumer electronics, toys, and films. If the reading is >
