GB/T 3780.21-2025 Active National standards

GB/T 3780.21-2025 Carbon black—Part 21:Determination of sieve residue—Water washing method

Publish Date: 2025-08-01 Implement Date: 2026-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 3780.21-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Carbon black

ICS Name: Rubber synthetic ingredients

Publish Date: 2025-08-01

Implement Date: 2026-02-01

Pages: 16 pages

Scope

This document describes the method of determining the sieve residue of untreated carbon black and rubber products using a water rinsing method.
This document is suitable for determining the sieve residue of carbon black, rubber products, and other powders, but it is not suitable for determining the sieve residue of carbon black that has been treated with oil or powder sieve residues.

Development Information

Word Count: 19 Thousand words Pages: 16 pages

Same series standard

GB/T 3780.7-2025 Carbon black—Part 7:Determination of pH value GB/T 3780.31-2025 Carbon black—Part 31:Determination of total hydrogen content

Replace the following standards

GB/T 3780.21-2016 Carbon black—Part 21:Determination of sieve residue—Water washing method GB/T 3781.5-2019 Acetylene black—Part 5:Determination of grit content

Referenced Standards

GB 3778-1994 Carbon black for use in rubber industry GB 3778-2003 Carbon black for use in rubber products GB/T 3778-2011 Carbon black for use in rubber products GB/T 3778-2021 Carbon black for use in rubber products GB/T 3782-1993 Acetylene black—Specification limits GB/T 3782-2006 Acetylene black GB/T 3782-2016 Acetylene black GB/T 6003.1-1997 Test sieves of metal wire cloth GB/T 6003.1-2012 Test sieves—Technical requirements and testing—Part 1:Test sieves of metal wire cloth GB/T 6003.1-2022 Test sieves—Technical requirements and testing—Part 1:Test sieves of metal wire cloth GB/T 7044-1993 Colour black—Specification GB/T 7044-2003 Colour carbon black GB/T 7044-2013 Colour carbon black GB/T 7044-2022 Colour carbon black GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values

Adopt standards

ISO 1437:2017

Related Standards

GB/T 11409.4-1989 Replaced

GB/T 11409.4-1989 Test method of weight loss on heating for rubber antiagers and vulcanizing accelerators

Publish Date: 1989-03-31

GB/T 11409.5-1989 Replaced

GB/T 11409.5-1989 Test method of residue on sieve for rubber antiagers and vulcanizing accelerators

Publish Date: 1989-03-31

GB/T 11409.7-1989 Replaced

GB/T 11409.7-1989 Test method of ash for rubber antiagers and vulcanizing accelerators

Publish Date: 1989-03-31

GB/T 11409.8-1989 Replaced

GB/T 11409.8-1989 Test method of viscosity for rubber antiagers and vulcanizing accelerators—Rotational viscometer method

Publish Date: 1989-03-31

GB/T 12827-1991 Replaced

GB/T 12827-1991 Standard reference acetylene black and standard practice for evaluation

Publish Date: 1991-04-23

GB/T 13021-1991 Replaced

GB/T 13021-1991 Determination for the carbon black content of polyethylene pipes and fittings by calcination and pyrolysis

Publish Date: 1991-07-03