GB/T 7974-2013
ActivePaper, board and pulps - Measurement of diffuse blue reflectance factor - D65 brightness（Diff/Geometry,Outdoor daylight conditions）
纸、纸板和纸浆 蓝光漫反射因数D65亮度的测定（漫射/垂直法，室外日光条件）
Application Summary AI generated
This standard specifies the method for measuring the diffuse blue reflectance factor (D65 brightness) of paper, board, and pulps under outdoor daylight conditions using diffuse/geometry geometry. It is applied in the pulp and paper industry for quality control and product specification, particularly to assess the optical brightness of white and near-white materials as perceived under natural daylight. The test is critical for manufacturers and buyers to ensure consistency in whiteness for products like printing paper, packaging board, and tissue.
Related Standards
GB/T 20810-2006
Bathroom Tissue (Including Bathroom Tissue Base Paper)
GB/Z 24987-2010
Paper, board and pulps - Estimation of uncertainty for test methods
GB/T 20216-2006
Determination of effective residual ink
GB/T 20811-2006
Waste paper recycled requirements
GB/T 7977-2007
Paper,board and pulps - Determination of conductivity of aqueous extracts
GB/T 1539-2007
Paperboard - Determination of bursting strength
GB/T 10339-2007
Testing method of light scattering and absorption coefficient for paper，board and pulps
GB/T 4687-2007
Paper, board, pulps and related terms - Vocabulary
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.