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BS EN ISO 7906:2022

BS EN ISO 7906:2022

$102.76

Leather. Tests for colour fastness. General principles of testing

Published By Publication Date Number of Pages
BSI 2022 18
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This document specifies general principles on colour fastness evaluation tests for leather, as listed in Annex A. Procedures included in this document are common to most of the fastness test methods. This document provides a common basis for testing and reporting colour fastness. The uses and limitations of the methods are pointed out, several terms are defined, an outline of the drafting of the methods is given and the contents of the clauses describing the methods are discussed. Procedures common to a number of the methods are discussed briefly. Colour fastness means the resistance of the colour to the different agents to which these materials can be exposed during manufacture and their subsequent use. The change in colour of leather and staining of undyed adjacent fabrics or other materials are assessed as fastness ratings. Other visible changes in the leather under test, for example surface appearance, change in gloss or shrinkage, are considered as separate properties and reported as such. The leather fastness test methods can be used not only for assessing leather and related materials, such as coated leather and leather board, but also for the eventual assessment of the colour fastness of leather dyes. When such a method is so used, the dye is applied to a specified retanned leather or crust leather in defined depths of colour by stated procedures and the material is then tested in the usual way.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
6 Foreword
7 1 ​Scope
2 ​Normative references
3 ​Terms and definitions
4 ​General principles
8 5 ​Outline of form of the methods
6 ​The “Scope” clause
7 ​The “Normative references” clause
8 ​The “Terms and definitions” clause
9 ​The “Principle” clause
10 ​The “Apparatus”, “Reagents” or “Reference materials” clause(s)
10.1 ​General
10.2 ​Test solutions
9 10.3 ​Adjacent materials
10.4 ​Coating substances
10 10.5 ​Standard reference for fading
10.6 ​Standard reference for rubbing and soiling
10.7 ​Selection and use of adjacent fabrics
10.7.1 ​General
10.7.2 ​Types of adjacent fabric
10.7.3 ​Dimensions and use of adjacent fabrics
11 ​The “Test specimen” clause
11.1 ​General
11 11.2 ​Preparation of specimens
11.3 ​Preparation of composite specimens
11.3.1 ​General
11.3.2 ​Staples
11.3.3 ​Composite specimens using two single-fibre adjacent fabrics
11.3.4 ​Composite specimens using one multifibre adjacent fabric
12 12 ​Conditioning
13 ​The “Procedure” clause
14 ​Assessment of colour fastness
14.1 ​General conditions
13 14.2 ​Colour fastness with respect to change in colour
14.3 ​Colour fastness with respect to staining
14 15 ​Conditions of viewing and illumination in assessing colour fastness
16 ​Test report
15 Annex A (informative) Leather fastness test methods
16 Bibliography

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BS EN ISO 7906:2022
$102.76