GB/T 3920-2024 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 3920-2024 | English | 185 |
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Textiles - Tests for colour fastness - Colour fastness to rubbing
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| GB/T 3920-2008 | English | 70 |
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Textiles -- Tests for colour fastness -- Colour fastness to rubbing
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| GB/T 3920-1997 | English | 239 |
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Textiles--Tests for colour fastness--Colour fastness to rubbing
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| GB/T 3920-1983 | English | RFQ |
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Textiles--Testing method for colour fastness to rubbing
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GB/T 3920-2024: Textiles - Tests for colour fastness - Colour fastness to rubbing---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT3920-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.01
CCS W 04
Replacing GB/T 3920-2008
Textiles - Tests for colour fastness - Colour fastness to
rubbing
(ISO 105-X12.2016, Textiles - Tests for colour fastness - Part X12.Colour fastness to
rubbing, MOD)
Issued on. DECEMBER 31, 2024
Implemented on. JANUARY 01, 2027
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 7
2 Normative references... 7
3 Terms and definitions... 7
4 Principle... 8
5 Equipment and materials... 8
6 Reagents... 9
7 Test sample... 9
8 Procedure... 9
9 Assessment... 11
10 Test report... 11
Bibliography... 12
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020
Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents.
This document replaces GB/T 3920-2008 Textiles - Tests for colour fastness - Colour
fastness to rubbing. Compared with GB/T 3920-2008, except for structural adjustment
and editorial changes, the main technical changes are as follows.
-- Add the tolerance of the rectangular rubbing head size [see 5.1a)];
-- Add the description of “with the long side parallel to the warp direction” (see
5.2);
-- Change “Note” to clause content, and change the specification of aluminum
oxide water-resistant fine sandpaper to “particle size of P600” (see 5.3; 4.3 of
the 2008 edition);
-- Add “balance” in “equipment and materials” (see 5.5);
-- Add a chapter on “Reagents” and supplement the requirements for test water
(see Chapter 6);
-- For another method of cutting the samples, change it to “make the length
direction of the sample at 45° to the warp and weft directions of the fabric”
(see 7.1; 5.1 of the 2008 edition);
-- Add the description of “With consultation among the relevant parties,
conditioning may also be carried out in the optional standard atmosphere
specified in GB/T 6529, which shall be stated in the test report. Place each
sample and rubbing cloth on a sieve or perforated rack for conditioning.” (see
7.3);
-- Add the description of “Prepare two groups of samples, one for dry rubbing
test and the other for wet rubbing test.” (see 8.1);
-- Change the description of the test steps for wet rubbing color fastness (see 8.3;
6.3 of the 2008 edition);
-- Change “water content” to “level of soak”, and add the calculation formula
for level of soak (see 8.3; 6.3 of the 2008 edition);
-- Move the description of “Remove any excess fibers from the surface of the
rubbing cloth that may affect the rating.” to the assessment part (see 9.1; 6.2
of the 2008 edition);
-- Add descriptions of “test atmospheric conditions”, “If the sample is yarn and
is woven into a fabric, indicate its organizational structure” and “any deviation
from this document and any anomalies in the tests” in the test report (see
Chapter 10).
This document adopts ISO 105-X12.2016 Textiles - Tests for colour fastness - Part X12.
Colour fastness to rubbing by modification.
Compared with ISO 105-X12.2016, this document has the following structural
adjustments.
-- Add “Terms and definitions” (see Chapter 3);
-- Add “Reagents” (see Chapter 6);
-- 8.3 of this document corresponds to 6.3 and 6.4 of ISO 105-X12.2016;
The technical differences between this document and ISO 105-X12.2016 and their
reasons are as follows.
-- Use the normatively referenced GB/T 251 to replace ISO 105-A03 (see 5.4),
GB/T 6151-2016 to replace ISO 105-A01.2010 (see 9.3), GB/T 6529 to
replace ISO 139 (see 7.3 and 7.4), GB/T 33729 to replace ISO 105-F09 (see
5.2), and add GB/T 6682 (see Chapter 6) to adapt to our country’s technical
conditions;
-- Adjust the verification test to “Note” (see Chapter 5; Chapter 4 of ISO 105-
X12.2016) as informative information;
-- Adjust the “Note” about using other rubbing color fastness testers to 5.1 (see
5.1) to make the statement clearer;
-- Add the tolerance of the rectangular rubbing head size [see 5.1a)], to unify the
test conditions;
-- Add the description of “with the long side parallel to the warp direction” (see
5.2), to unify the test operation;
-- Add “balance” in “Equipment and materials” (see 5.5) for the determination
of level of soak in wet rubbing test;
-- Supplement the requirements for test water (see Chapter 6) to unify the test
conditions;
-- Add the description “Prepare two groups of samples, one for dry rubbing test
and the other for wet rubbing test.” (see 8.1) to make the statement clearer;
-- Add content on the calculation and adjustment method of rubbing cloth level
of soak (see 8.3) to make the statement clearer;
-- Add descriptions of “test atmospheric conditions”, “If the sample is yarn and
is woven into a fabric, indicate its organizational structure” and “any deviation
from this document and any anomalies in the tests” in the test report (see
Chapter 10), to clarify the test conditions.
This document also makes the following editorial modifications.
-- To coordinate with the existing standards, change the name of the standard to
Textiles - Tests for colour fastness - Colour fastness to rubbing;
-- Add a description of “use the gray scale for staining” in the chapter “Principle”
(see Chapter 4);
-- Add recommendations on the specifications of water-resistant fine sandpaper
(see 5.3);
-- Remove the note on the use of other levels of soak (see 6.3 of ISO 105-
X12.2016);
-- Add a note on “squeezing device” (see 8.3);
-- Refine the description of the wet rubbing color fastness test procedure (see
8.3);
-- Add the note “During assessment, the degree of staining of the halo part is not
taken into account.” (see Chapter 9).
The previous versions of this document and the documents which are replaced by this
document are as follows.
-- First published in 1983 as GB/T 3920-1983, first revised in 1997, and second
revised in 2008;
-- This is the third revision.
1 Scope
This document describes the test methods for colour fastness to rubbing of various types
of textiles.
This document applies to dyed or printed yarns, fabrics and textile products made from
all types of fibers, including textile carpets and other velvet fabrics.
This document includes two tests, one using a dry rubbing cloth and the other using a
wet rubbing cloth.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 251, Textiles - Tests for colour fastness - Grey scale for assessing staining
(GB/T 251-2008, ISO 105-A03.1993, IDT)
GB/T 6151-2016, Textiles - Tests for colour fastness - General principle of testing
(GB/T 6151-2016, ISO 105-A01.2010, MOD)
GB/T 6529, Textiles - Standard atmospheres for conditioning and testing (GB/T
6529-2008, ISO 139.2005, MOD)
3 Terms and definitions
No terms and definitions need to be defined in this document.
4 Principle
Rub the textile sample with a dry rubbing cloth and a wet rubbing cloth respectively,
and use the gray scale for staining to assess the staining degree of the rubbing cloth.
5 Equipment and materials
Testing machine for colour fastness to rubbing, with a rubbing head of two optional
sizes for reciprocating linear rubbing motion; other instruments that can obtain the same
test results may also be used for this test.
6 Reagents
Grade-3 water, in line with the requirements of GB/T 6682.
7 Test sample
If the textile to be tested is a fabric or carpet, prepare two groups of samples with a
size of not less than 50 mm × 140 mm, one for the dry rubbing test and the other for the
wet rubbing test.
8 Procedure
Use a clamping device to fix the sample on the tester platform so that the length
direction of the sample is consistent with the running direction of the rubbing head.
Place a piece of metal mesh or sandpaper between the tester platform and the sample to
help reduce movement of the sample during rubbing. Test the samples prepared in
Chapter 7 according to the procedures specified in 8.2 and 8.3.
9 Assessment
Remove any excess fibers from the surface of the rubbing cloth that may affect the
rating.
10 Test report
The test report shall at least include the following.
a) number of this document, i.e., GB/T 3920-2024;
b) rubbing head used in the test.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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