GB/T 5211.9-2025 "General methods of test for pigments and extenders - Part 9: Comparison of light fastness of colored pigments of similar types" applies to colored pigments and specifies general test methods for comparing the light fastness of colored pigments of similar types. It provides two exposure methods: Method A involves exposing pigment dispersion specimens under glass to natural light, and Method B involves directly exposing pigment dispersion specimens to an artificial light source. The comparison of light fastness is completed by evaluating the exposure results of the reference pigment and the test sample.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | G53 | ICS | 87.060.10 |
| Release Date | 2025-06-30 00:00:00 | Implementation Date | 2026-01-01 00:00:00 |