Foreword

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IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to further the advancement of leather science and technology. IULTCS has three Commissions, which are responsible for establishing international methods for the sampling and testing of leather. ISO recognizes IULTCS as an international standardizing body for the preparation of test methods for leather.

This document was prepared by the Fastness Tests Commission of the International Union of Leather Technologists and Chemists Societies (IUF Commission, IULTCS) in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

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1 Scope

This document specifies methods for determining the fastness of the surface of leather to hydroalcoholic mixtures.

It is applicable to all kinds of leather.

2 Normative references

3 Terms and definitions

4 Principle

5 Equipment and materials

5.1

5.2

5.3

5.4

5.5

5.6

5.7

5.8

5.9

5.10

5.11

5.12

6 Procedure

6.1 General

6.2 Conditioning and test atmosphere conditions

6.3 Test media

6.4 Method 1, surface wetting

6.5 Method 2, linear rubbing test with hydroalcoholic mixtures

6.6 Cleaning of test specimens

7 Evaluation

8 Test report

ISO 7979:2025

Leather. Tests for colour fastness. Colour fastness to hydroalcoholic mixtures

Current

Published:

15 Jul 2025