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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
Carbon black—Part2:Determination of dibutyl phthalate absorption number
WITHDRAWN published on 11.10.2003
Selected format:Carbon black—Part 2:Determination of oil absorption number
WITHDRAWN published on 13.12.2007
Selected format:-
WITHDRAWN published on 1.1.1988
Selected format:Carbon black for use in the rubber industry—Determination of light transmittance of toluene extract—Method for product evaluation
WITHDRAWN published on 26.9.1997
Selected format:Carbon black used in rubber products--Determination of sieve residue--Water washing method
WITHDRAWN published on 23.4.1991
Selected format:Carbon black used in rubber products—Determination of sieve residue—Water washing method
WITHDRAWN published on 29.5.2002
Selected format:Carbon black—Part 21:Determination of sieve residue for rubber compounding ingredients—Water washing method
WITHDRAWN published on 1.8.2006
Selected format:Carbon black--Determination of dibutyl phthalate absorption number (Method B)
WITHDRAWN published on 1.1.1983
Selected format:Carbon black--Determination of dibutyl phthalate absorption number (Compressed sample)
WITHDRAWN published on 1.1.1983
Selected format:Carbon black—Preparation of sample and determination of dibutylphthalate absorption number(compressed sample)
WITHDRAWN published on 22.12.1994
Selected format:Latest update: 2025-12-29 (Number of items: 2 253 390)
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