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GB/T 3921-2008 PDF in English


GB/T 3921-2008 (GB/T3921-2008, GBT 3921-2008, GBT3921-2008)
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Standards related to: GB/T 3921-2008

GB/T 3921-2008: PDF in English (GBT 3921-2008)

GB/T 3921-2008
GB
ICS 59.080.01
W 04
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Replacing GB/T 3921.1~3921.5-1997
Textiles - Tests for Colour Fastness - Colour
Fastness to Washing with Soap or Soap and
Soda
(ISO 105-C10. 2006, MOD)
Issued on. April 29, 2008 Implemented on December 01, 2008
Jointly issued by. General Administration of Quality Supervision,
Inspection and Quarantine (GAQSIQ);
Standardization Administration (SAC) of the People's
Republic of China.
Table of Contents
Forward ... 3 
1 Scope ... 5 
2 Normative References... 5 
3 Principle ... 6 
4 Apparatus ... 6 
5 Reagents and Materials ... 7 
6 Test Specimen ... 8 
7 Operation Procedures ... 9 
8 Test Report ... 10 
Forward
This Standard modifies and adopts ISO 105-C10.2006 "Textiles - Tests for Colour
Fastness - Part C10. Colour Fastness to Washing with Soap or Soap and Soda".
Compared with ISO 105-C10.2006, the main differences in this Standard are as
follows.
1. The international standards specified in normative references are replaced by
corresponding national standards;
2. The flax adjacent fabrics complying with GB/T 13765 are added in Table 1.
3. The rinsing method of composite-specimens after washing in 7.3 is improved.
This Standard shall replace GB/T 3921.1-1997 "Textiles - Tests for Colour Fastness -
Colour Fastness to Washing. Test 1", GB/T 3921.2-1997 "Textiles - Tests for Colour
Fastness - Colour Fastness to Washing. Test 2", GB/T 3921.3-1997 "Textiles - Tests
for Colour Fastness - Colour Fastness to Washing. Test 3", GB/T 3921.4-1997
"Textiles - Tests for Colour Fastness - Colour Fastness to Washing. Test 4" and GB/T
3921.5-1997 "Textiles - Tests for Colour Fastness - Colour Fastness to Washing. Test
5".
Compared with GB/T 3921.1~3921.5-1997, the main changes in this Standard are as
follows.
1. Five parts of the original standards are integrated as one standard;
2. The professional standard of the instrumental assessment and international
standard of acetate adjacent fabrics are added in normative references;
3. The recommendation on the mechanical stirring device and heating soap
solution device is added;
4. The requirements of multi-fibre adjacent fabrics adopted for different test
methods are added;
5. The selection method for the second piece of single-fibre adjacent fabrics tested
at 60°C and 95°C is modified;
6. The rinsing method of composite specimens after washing is modified;
7. The optional assessment method for the change in colour of the specimen or the
staining of adjacent fabric instrumentally is added.
This Standard was proposed by China National Textile and Apparel Council.
This Standard shall be under the jurisdiction of the Basic Standard Subcommittee of
Technical Committee on Textiles of Standardization Administration of China (SAC/TC
209/SC 1).
Chief Drafting Organizations of this Standard. Standardization Institute of Textile
Industry, and Beijing Entry-Exit Inspection and Quarantine Bureau.
Chief drafting staffs of this Standard. Si Ying, and Yu Feng.
The historical editions replaced by this Standard are as follows.
- GB 3921-1983, GB/T 3921.1-1997, GB/T 3921.2-1997, GB/T 3921.3-1997,
GB/T 3921.4-1997, and GB/T 3921.5-1997.
Textiles - Tests for Colour Fastness - Colour Fastness to
Washing with Soap or Soap and Soda
1 Scope
This Standard specifies methods for determining the colour fastness to washing of all
kinds of textiles that are commonly used in households, It includes 5 type of tests on
different washing procedures - from mild to severe procedure.
This Standard is only used to determine the effect of washing on the colour fastness of
the textile. It is not intended to reflect the result of the comprehensive laundering
procedure.
2 Normative References
The following normative documents contain provision which, through reference in this
text, constitute the provisions of this Standard. For dated reference, subsequent
amendments (excluding amending error in the text) or revisions of these publications
do not apply. However, all parties who enter into an agreement according to this
Standard are encouraged to study whether the latest edition of the normative
document is applicable. For undated references, the latest edition of the normative
document referred to applies.
GB 250 Grey Scale for Assessing Change in Colour (GB 250-1995, ISO 105-A02.
1993, IDT)
GB 251 Gray Scale for Assessing Staining (GB 251-1995, ISO 105-A03. 1993,
IDT)
GB/T 6151 Textiles - Tests for Colour Fastness - General Principle of Testing
(GB/T 6151-1997, ISO 105-A01. 1994, EQV)
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
(GB/T 6682-1992, ISO 3696. 1987, NEQ)
GB 7565 Textiles - Tests for Colour Fastness - Specification for Standard
Adjacent Fabric-Cotton and Viscose (GB/T 7565-1987, ISO 105-F02. 1982, NEQ)
GB/T 7568.1 Textiles - Tests for Colour Fastness - Specification for Wool
Adjacent Fabric (GB/T 7568.1-2002, ISO 105-F01. 2001, MOD)
GB/T 7568.4 Textiles - Tests for Colour Fastness - Specification for Polyester
them twice in Grade 3 water (5.4) respectively. Then rinse them clean in running
water.
7.4 For all methods, extract the excess water from the composite-specimen by
squeezing the test specimen by hand.
Open out the composite-specimen by cutting the stitching except on one of the
shorter sides if necessary.
7.5 Dry the specimen by pressing it flat between two filter papers to remove excess
water. Then dry by hanging it in air at a temperature not exceeding 60 °C; the
specimen and adjacent fabric are contacted only at the line of stitching.
7.6 Assess the change in colour of the specimen and the staining of the adjacent
fabric with reference to the original specimen by using either the grey scales or
instrument. See GB 250, GB 251, GB/T 8424.3, FZ/T 01023 and FZ/T 01024.
8 Test Report
Test report shall include the following information.
a) Serial number of this Standard (GB/T 3921-2008);
b) All details of test specimen;
c) The number of test methods used, from Table 2;
d) The numerical rating for the change in colour of the specimen with grey scales
or instrumental assessment;
e) If single-fibre adjacent fabrics were used, the numerical rating for staining of
each kind of adjacent fabric used;
f) If a multifibre adjacent fabric was used, the staining of each type of fibre in the
multifibre adjacent fabric, and the type of multifibre adjacent fabric used;
g) Any deviation details of this Standard and abnormal phenomena in tests.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.