GB/T 40969-2021
ActivePaper and board—Determination of colour （D50/2° diffuse reflectance method)
纸和纸板 颜色的测定（D50/2°漫反射法)
Application Summary AI generated
This standard specifies the method for measuring the colour of paper and board using D50 illumination and a 2° observer angle under diffuse reflectance conditions. It is applied in the paper manufacturing and printing industries for quality control, colour matching, and consistency assessment of products such as packaging materials, printing papers, and specialty boards. The method ensures standardized colour evaluation under controlled lighting and viewing conditions, critical for commercial and industrial applications.
Related Standards
GB/T 10335.2-2005
Coated paper and board - Light weight coated paper
GB/T 7973-2003
Paper，board and pulps--Measurement of diffuse reflectance factor(Diff/Geometry)
GB/T 10335.4-2004
Coated paper and board--Coated folding board
GB/T 10335.3-2004
Coated paper and board--Coated ivory board
GB/T 10335.1-2005
Coated paper and board-Coated art paper
GB/T 1913.1-2005
Unbleached impregnating insulating paper
GB/Z 166-2026
Paper and board—Measurement of water contact angle by optical methods
GB/T 1540-2002
Paper and board--Determination of water absorption--Cobb method
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.