Standard No.:	GB/T 3780.21-2006
Chinese Name:	炭黑 第21部分：橡胶配合剂筛余物的测定 水冲洗法
English Name:	Carbon black―Part 21：Determination of sieve residue for rubber compounding ingredients―Water washing method
Professional Classification:	G49 Carbon black
Professional Classification:	GB National Standard
ICS Classification:	83.040.30 Auxiliary materials and additives for plastics
Issued by:
Issued on:	2006-08-01
Implemented on:	2007-01-01
Status:	ABOLISHED
Replace:	GB/T3780.21-2002 Carbon black used in rubber products--Determination of sieve residue--Water washing method
Language:	English
File Format:	PDF
Word Count:
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Scope

This Part of GB/T 3780 specifies a method for determining the water-wash sieve residue of raw material powder from carbon black and rubber products.
This Standard is applicable to regular, untreated carbon black, colour carbon black for rubber products and raw material powder for used in rubber products. Untreated carbon black with other purpose may adopted by making reference to this Part. However, this Part may not be applicable to oil-treated carbon blacks and carbon black powder.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this Part of GB/T 3780. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.