Leather - Tests for colour fastness - Colour fastness to perspiration (ISO/DIS 11641:2024); German and English version prEN ISO 11641:2024
Abstract
This document specifies a method for determining the colour fastness to perspiration of leather of all kinds at all stages of processing. It applies particularly to gloving, clothing and lining leathers, as well as leather for the uppers of unlined shoes. The method uses an artificial perspiration solution to simulate the action of human perspiration. Since perspiration varies widely from one individual to the next, it is not possible to design a method with universal validity, but the alkaline artificial perspiration solution specified in this International Standard will give results corresponding to those with natural perspiration in most cases. NOTE In general, human perspiration is weakly acidic when freshly produced. Micro-organisms then cause it to change, the pH usually becoming weakly alkaline (pH 7,5 to 8,5). Alkaline perspiration has a considerably greater effect on the colour of leather than has acid perspiration. Therefore, for coloured leather, an alkaline perspiration solution is used to simulate the most demanding conditions encountered in practice.
Begin
2024-05-03
WI
00289262
Planned document number
DIN EN ISO 11641
Project number
06236738
Responsible national committee
NA 062-05-51 AA - Requirements and physical test methods of leather and ....
Responsible european committee
CEN/TC 289/WG 3 - Fastness test methods
Responsible international committee
IULTCS - International Union of Leather Technologists and Chemists Societies
draft standard
Leather - Tests for colour fastness - Colour fastness to perspiration (ISO/DIS 11641:2024); German and English version prEN ISO 11641:2024
2024-10
Order from DIN Media
