Textiles-Tests for colour fastness - Colour fastness to bleaching: Hypochlorite
1 Scope
This standard specifies a method for determining the resistance of the colour of textiles of all kinds and in all forms to the action of bleaching baths containing pypocholoride in concentrations normally used in commercial bleaching. It is applicable mainly to natural and regenerated cellulose materials.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all editions cited are 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 250-1995 Gray scale for assessing change in colour (idt ISO 105-A02:1993)
GB/T 6151-1997 Textiles - Tests for colour fastness - General principle of testing (eqv ISO 105-A01:1989)
GB/T 3921.1-1997 Textiles - Tests for colour fastness - Colour fastness to washing: Test 1 (eqv ISO 105-C01:1989)
3 Principle
A specimen of the textile is agitated in a solution of hypochlorite, rinsed in water, agitated in a hydrogen peroxide solution or sodium hydrogen sulfite solution, rinsed and dried. The change in colour is assessed with the grey scale.
Contents
Foreword i
ISO foreword ii
1 Scope
2 Normative references
3 Principle
4 Apparatus and reagents
5 Test specimen
6 Procedure
7 Test report
