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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.
  •  China "b*" GB Standards List:
  • Standard  Code Standard Title Standard Class Order
    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*

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