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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. |
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 7962.23-2019 |
Test method of colourless optical glass—Part 23: Resistance to climatic 无色光学玻璃测试方法 第23部分：耐气候稳定性 |
China National Standards Test method of colou |
 English PDF |
| GB/T 7962.22-2019 |
Test method of colourless optical glass—Part 22：Resistance to attack by aqueous alkaline phosphate-containing 无色光学玻璃测试方法 第22部分：耐磷酸稳定性 |
China National Standards Test method of colou |
English PDF |
| GB/T 7962.21-2019 |
Test method of colourless optical glass—Part 21：Resistance to attack by aqueous alkaline solutions 无色光学玻璃测试方法 第21部分：耐碱稳定性 |
China National Standards Test method of colou |
English PDF |
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