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Standards GB - Chinese national standards - Page 5139
Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
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GB/T 6846-2008
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Photography - Determination of ISO safelight conditions
Standard published on 24.9.2008
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GB/T 6847-2012
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Imaging materials - Photographic film and paper - Determination of curl
Standard published on 31.12.2012
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GB/T 6848-2008
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Cinematography - Cores for motion-picture and magnetic film rolls - Dimensions
Standard published on 18.6.2008
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GB/T 6849-2025
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Imaging materials—Photographic films and papers—Wedge test for brittleness
Standard published on 30.6.2025
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GB/T 685-2013
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Chemical reagent—Formaldehyde solution
Standard published on 31.12.2013
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GB/T 6850-2003
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Cinematography--Labelling of containers for raw-stock motion-picture films and magnetic films--Minimum information specifications
Standard published on 10.11.2003
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GB 6851-2008
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pH primary reagent - General rules for certification
Standard published on 18.6.2008
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GB 6853-2008
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pH primary reagent - Potassium dihydrogen phosphate
Standard published on 31.12.2008
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GB 6854-2008
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pH primary reagent - Disodium hydrogen phosphate
Standard published on 31.12.2008
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GB 6856-2008
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pH primary reagent - Sodium tetraborate decahydrate
Standard published on 31.12.2008
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