1 Scope
This standard specifies a method for determining the colour fastness to perspiration of leather.
This standard is applicable to leather of all kinds at all stages of processing, particularly to gloving, clothing and lining leathers, as well as leather for the uppers of unlined shoes.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB/T 250 Gray scale for assessing change in colour (GB/T 250-2008, ISO 105-A02:1993, IDT)
GB/T 251 Gray scale for assessing staining (GB/T 251-2008, ISO 105-A03:1993, IDT)
GB/T 6682-92 Water for laboratory use — Specifications
GB 11404-89 Textiles — Tests for colour fastness-Specification for standard adjacent fabric: Multifibre
*QB/T 3812.2-99 Leather — Conditioning of test pieces for physical tests
Note: *see also GB 4689.2-84.
3 Principle
A leather specimen is soaked in artificial perspiration solution and a piece of adjacent fabric, also soaked in artificial perspiration solution, laid against each side to be tested. The composite specimen is left under pressure for a specified time in a suitable apparatus. The leather specimen and adjacent fabric are then dried, and the change in colour of the specimen and the staining of the adjacent fabric assessed with the grey scales.
Leathers with/without a finish may be tested intact or with the finish broken.
