[ 20° Geometry ] --> High-Gloss Surfaces (> 70 GU) [ 60° Geometry ] --> Universal / Medium Gloss (10 - 70 GU) [ 85° Geometry ] --> Low-Gloss / Matte Surfaces (< 10 GU) 1. The 60° Geometry (The Universal Angle) Medium-gloss surfaces.
A new result appeared. Technical Standards Repository - Updated 2023.
The core of ASTM D523 lies in its three-angle measurement system. Selecting the correct geometry is vital for achieving accurate and reliable data.
: ASTM standards, including D523, can typically be purchased or accessed through a subscription service. On the ASTM website, you can buy the standard in PDF format or purchase a subscription that grants access to a library of standards. astm d523 pdf new
The ASTM D523 standard has various applications in different industries, including:
Place the glossmeter firmly on the specimen, activate the light source, and record the Gloss Unit (GU) value.
She opened the search bar and typed: .
While the core physics of gloss measurement remains consistent, the new version (released June 2025) replaces the long-standing D523-14(2018) version.
"Meaning?"
ASTM standards undergo periodic reviews, reapprovals, and revisions to accommodate advancements in optical measurement technologies and instrumentation. Looking for the "new" PDF typically ensures you are compliant with the most recent technical updates, geometry tolerances, and instrument specifications approved by the ASTM D01 committee on Paint and Related Coatings. The Three Measuring Geometries [ 20° Geometry ] --> High-Gloss Surfaces (>
The new procedure explicitly warns against measuring through protective film or glass. It also adds a mandatory check for "drift" after every 10 measurements.
The glossmeter is calibrated using a black glass standard (usually provided with the meter) with a known refractive index (