This Document describes methods for determining the whiteness, tint, and diffuse blue reflectance factor of plastics using a spectrophotometer or a blue-light photometer. This Document is applicable to the determination of translucent or opaque, white or near-white, fluorescent or non-fluorescent plastics in the form of powders, granules, or flakes.
Basic Data
Standard ID
GB/T 2913-2026 (GB/T2913-2026)
Description (Translated English)
Plastics - Test for whiteness
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
G31
Classification of International Standard
83.080.01
Word Count Estimation
34,386
Date of Issue
2026-03-31
Date of Implementation
2026-10-01
Older Standard (superseded by this standard)
GB/T 2913-1982
Issuing agency(ies)
State Administration for Market Regulation, China National Standardization Administration
