Astm D523 Pdf New May 2026

A: Yes. ASTM.org offers a free 1-2 page scope and summary. But the full procedure, calculations, and precision tables require purchase.

The new procedure explicitly warns against measuring through protective film or glass. It also adds a mandatory check for "drift" after every 10 measurements. astm d523 pdf new

Modern materials (water-borne coatings, UV-cured plastics) require specific temperature (23±2°C) and relative humidity (50±5%) conditioning times. The new PDF specifies 24 hours minimum unless otherwise agreed. A: Yes

These are authorized resellers. They often bundle ASTM D523 with other gloss-related standards (e.g., ISO 2813, which is technically similar but not identical). The new procedure explicitly warns against measuring through

The new version explicitly excludes curved surfaces (which require a different standard, ASTM E430) and clarifies that it is not for use with metallic or mirror-like surfaces due to secondary reflections.

To prove why the new version matters, here is a breakdown of the latest edition’s core sections.