GB/T 45973-2025 Active National standards

GB/T 45973-2025 Paints and varnishes—Scratch test using a spring-loaded pen

Publish Date: 2025-08-01 Implement Date: 2026-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 45973-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Paints, pigments, and dyes

ICS Name: Paints and varnishes

Publish Date: 2025-08-01

Implement Date: 2026-02-01

Pages: 20 pages

Scope

This document describes a method of determining the scratch resistance of coatings by using a commonly used handheld stylus to generate scratches.
The test can be conducted using either a pointed stylus (Method A) or a disc-shaped stylus (Method B).
Both methods are universally applicable and can be used either on-site or on curved surfaces. Method A can also be used on small samples (with a minimum size of 30 mm × 50 mm).
The test can be conducted either as a "pass/fail" test (Test Requirement I) or as a grading test (Test Requirement II).