BS EN ISO 7906:2022

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Leather. Tests for colour fastness. General principles of testing

Published By	Publication Date	Number of Pages
BSI	2022	18

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Categories: 59.140.30 - Leather and furs, BSI

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Description

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.

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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

Additional information

Status	Definitive
Pages	18
Publication Date	2022-11-22
ISBN	978 0 539 19417 3
Standard Number	BS EN ISO 7906:2022
Title	Leather. Tests for colour fastness. General principles of testing
Identical National Standard Of	EN ISO 7906, ISO 7906
Descriptors	Leather-working equipment, Leather and fur technology, Leather clothing, Leather curing, Leather products, Leather, Leather industry, Colour-fastness tests, Colour fastness, Testing
Publisher	BSI
Committee	TCI/69
ICS Codes	59.140.30 - Leather and furs

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BS EN ISO 7906:2022

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