GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards; We provide Chinese GB standards and English version GB standards Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services. |
Standard Code | Standard Title | Standard Class | Order |
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GB/T 20147.4-2023 |
Colorimetry Part 4: CIE 1976 L* a* b* color space 色度学 第4部分:CIE 1976 L* a* b*颜色空间 |
China National Standards b* |
English PDF |
GB/T 30921.7-2016 |
Test method of purified terephthalic acid(PTA) for industrial use—Part 7: Determination of b* value—Color difference meter 工业用精对苯二甲酸(PTA)试验方法 第7部分:b*值的测定 色差计法 |
China National Standards b* |
English PDF |
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