Home / Standards / GB/T 20147.4-2023 GB/T 20147.4-2023 Active Colorimetry—Part 4: CIE 1976 L* a* b* colour space 色度学 第4部分：CIE 1976 L* a* b*颜色空间 Standard Type GBT ICS 29.140.01 CCS K71 Status 现行 Issue Date 2023-08-06 Implementation 2024-03-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A