Home / Standards / GB/T 39822-2021 GB/T 39822-2021 Active Plastics—Determination of yellowness index and change in yellowness index 塑料 黄色指数及其变化值的测定 Standard Type GBT ICS 83.080.01 CCS G31 Status 现行 Issue Date 2021-03-09 Implementation 2021-10-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A