Home / Standards / GB/T 2679.1-2020 GB/T 2679.1-2020 Active Paper—Determination of transmittance—Diffuse reflectance measurement 纸 透明度的测定 漫反射法 Standard Type GBT ICS 85.010 CCS Y30 Status 现行 Issue Date 2020-07-21 Implementation 2021-02-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A