GB/T 29865-2024 Textiles — Tests for colour fastness — Colour fastness to rubbing — Small areas
1 Scope
This document specifies a method for determining the resistance of the colour of textiles to rubbing off and staining other materials where the singling out of areas smaller than possible to test with the apparatus described in GB/T 3920 is required.
This document includes two tests, one with a dry rubbing cloth and one with a wet rubbing cloth.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 251 Textiles - Tests for colour fastness - Grey scale for assessing staining (GB/T 251-2008, ISO 105-A03:1993[ ISO 105-A03:1993 has been replaced by ISO 105-A03:2019.], IDT)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)
GB/T 6682 Water for analytical laboratory use - Specification and test methods (GB/T 6682-2008, ISO 3696:1987, MOD)
GB/T 33729 Textiles - Tests for colour fastness - Cotton rubbing cloth (GB/T 33729-2017, ISO 105-F09:2009, MOD)
3 Terms and definitions
No terms and definitions are listed in this document.
4 Principle
Specimens of the textile are rubbed with a dry rubbing cloth and with a wet rubbing cloth, and the staining degree of rubbing cloth is evaluated with the grey scale. The method is specifically designed for small areas of printed or otherwise coloured fabric where the singling out of areas smaller than possible to test with the standard rubbing device found in method GB/T 3920 is required.
5 Apparatus and materials
5.1 Suitable testing devices for determining the colour fastness to rubbing, using an alternating rotary motion and a single test finger of (25 ± 0.1)mm diameter mounted on a vertical weighted rod that rotates (405 ± 3)° with a downward force of (11.1 ± 0.5)N. Another device has a test finger of (16 ± 0.1)mm diameter with the downward force of (11.1 ± 0.5)N.
Note: Other devices can be used provided that the same results are obtained. There is no known correlation of results between the device used in this method and the methods described in GB/T 3920.
5.2 Rubbing cloth, meet the requirements of cotton rubbing cloth specified in GB/T 33729, cut into (50 ± 2)mm squares for the finger used in 5.1.
5.3 Soft-back waterproof abrasive paper, or grating of stainless steel wire 1mm in diameter and with a mesh width about 20mm.
Attention should be paid to the characteristics of the grating or abrasive paper used to hold the specimens as they may leave an imprint through the textile which would cause a false rating to be made. The use of the abrasive paper may be preferred for testing textile fabrics. 600 mesh aluminum oxide waterproof abrasive paper may be used.
5.4 Grey scale for assessing staining, in accordance with GB/T 251.
5.5 Balance: division value, 0.01g.
Note: Verification on the operation of the test and the apparatus should be made routinely and the results kept in a log. Use an in-house or established rubbing specimen and conduct three dry tests.
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus and materials
6 Reagent
7 Test specimens
8 Procedure
9 Evaluation
10 Test report
Bibliography
