This Part of GB/T 3903 is identical to International Standard ISO 17701: 2003 "Footwear - Test Methods for Uppers, Lining and Insocks - Colour Migration" (English edition).
In order to make it convenient for use, the following editing revisions had been made in this Part:
a) "This International Standard" is replaced with "this Part";
b) Replace decimal comma "","" with decimal ""."";
c) The Foreword of the International Standard was deleted.
d) Contents of the International Standard was deleted;
e) For the International Standards quoted in ISO 17701: 2003, which is replaced with corresponding national standards of China in this Part.
f) Appendix of the International Standard was deleted.
This Part was proposed by the China National Light Industry Council.
This Part is under the jurisdiction of National Technical Committee on Shoemaking of Standardization Administration of China.
Drafting organizations of this Part: China Leather and Footwear Industry Research Institute, Fujian Shoemaking Industry Technology Development Zone (Putian), Putian ALA Footwear & Clothing Co., Ltd.
Chief drafting staffs of this Part: Zhang Weijuan, Wang Dechun, Zhang Jinluan.
Footwear - Test Methods for Uppers, Lining and Insocks - Colour Migration
鞋类 帮面、衬里和内垫试验方法 颜色迁移性
1 Scope
This Part of GB/T 3903 specifies a test method for determining the propensity of a material to cause discolouration of another material when stored in close contact.
This Part is applicable to all materials which are used in intimate contact, and to adhesives which are used to bond them.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Part of GB/T 3903. 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.
GB/T 250 Textiles - Tests for Colour Fastness - Grey Scale for Assessing Change in Colour (GB/T 250-2008, ISO 105-A02: 1993, IDT)
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 Textiles - Tests for Colour Fastness - General Principles of Testing (GB/T 6151-1997, eqv ISO 105-A01: 1994)
GB/T 22049 Footwear - Standard Atmospheres for Conditioning and Testing of Footwear and Components for Footwear (GB/T 22049-2008, ISO 18454:2001, IDT)
3 Term and Definition
For the purposes of This Standard, the following term and definition applies.
3.1 Colour migration
Discolouration caused by movement of colour from one material to another when stored
4 Apparatus and Material
The following apparatus and material shall be used:
4.1 Two smooth glass plates at least 52 mm × 42 mm and mass 50 g ± 5 g.
4.2 Mass of sufficient size that when combined with the mass of the glass plate will exert a pressure of 5.2 kPa ± 0.5 kPa on the test specimen of area 2 000 mm2 ± 180 mm2 (normally a mass of 1 000 g ± 10 g).
4.3 Dark test environment at 60 ℃± 2 ℃.
Note: An oven that does not have a glass door or panel is suitable.
4.4 Grey scales with half step ratings for assessing change in colour and degree of staining complying with GB/T 251 and GB/T 251, respectively.
4.5 Clock capable of recording times to the nearest 1 min over a 4 h period.
4.6 Artificial lighting conditions as specified in GB/T 6151 or north daylight.
