This standard specifies the method for determining the transparency of paper with green light irradiation and a white board with a specified reflection factor for the backing. This standard applies to the determination of the transparency of white or near-white translucent paper, tracing paper and other paper. Note: The determination of the transparency of colored translucent paper can be carried out with reference to the method specified in this standard, but only for comparison between papers of the same color.
GB/T 2679.1-1993 history
2020GB/T 2679.1-2020 Paper—Determination of transmittance—Diffuse reflectance measurement
2013GB/T 2679.1-2013 Paper.Determination of transmittance.Diffuse reflectance measurement