ISO/FDIS 11641
(Main)Leather — Tests for colour fastness — Colour fastness to perspiration
Leather — Tests for colour fastness — Colour fastness to perspiration
ISO 11641:2012 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 ISO 11641:2012 will give results corresponding to those with natural perspiration in most cases.
Cuir — Essais de solidité des coloris — Solidité des coloris à la sueur
L'ISO 11641:2012 spécifie une méthode permettant de déterminer la solidité des coloris à la sueur sur les cuirs de toutes catégories, à toutes les phases du traitement. Elle s'applique particulièrement aux cuirs destinés à la fabrication des gants, des vêtements et des parements, ainsi qu'aux cuirs pour les tiges de chaussures sans doublure. La méthode utilise une solution de sueur artificielle afin de simuler l'action de la transpiration humaine. Attendu que la sueur varie largement d'une personne à une autre, il n'est pas possible de concevoir une méthode ayant une validité universelle, mais la sueur artificielle alcaline spécifiée dans l'ISO 11641:2012 donne des résultats correspondant dans la plupart des cas à ceux obtenus avec la sueur naturelle.
General Information
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Standards Content (Sample)
FINAL DRAFT
International
Standard
ISO/FDIS 11641
IULTCS
IUF 426
IULTCS
Leather — Tests for colour fastness
Voting begins on:
— Colour fastness to perspiration
2025-08-14
Cuir — Essais de solidité des coloris — Solidité des coloris à la Voting terminates on:
sueur 2025-10-09
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference numbers
IULTCS/IUF 426:2025(en) © ISO 2025
FINAL DRAFT
International
Standard
ISO/FDIS 11641
IULTCS
IUF 426
IULTCS
Leather — Tests for colour fastness
Voting begins on:
— Colour fastness to perspiration
Cuir — Essais de solidité des coloris — Solidité des coloris à la sueur
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Reference numbers
Published in Switzerland ISO/FDIS 11641:2025(en)
IULTCS/IUF 426:2025(en) © ISO 2025
ii
IULTCS/IUF 426:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
6 Test pieces . 4
7 Procedure . 4
8 Evaluation . 5
9 Precision . 5
10 Test report . 5
Annex A (informative) Commercial sources for apparatus and materials . 6
Bibliography . 7
iii
IULTCS/IUF 426:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO’s adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
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).
This third edition cancels and replaces the second edition (ISO 11641:2012), which has been technically
revised.
The main changes are as follows:
— update of normative references, in particular to ISO 2418 and to ISO 7906.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
FINAL DRAFT International Standard
IULTCS/IUF 426:2025(en)
Leather — Tests for colour fastness — Colour fastness to
perspiration
1 Scope
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 105-A02, Textiles — Tests for colour fastness — Part A02: Grey scale for assessing change in colour
ISO 105-A03, Textiles — Tests for colour fastness — Part A03: Grey scale for assessing staining
ISO 105-A04, Textiles — Tests for colour fastness — Part A04: Method for the instrumental assessment of the
degree of staining of adjacent fabrics
ISO 105-A05, Textiles — Tests for colour fastness — Part A05: Instrumental assessment of change in colour for
determination of grey scale rating
ISO 105-E04, Textiles — Tests for colour fastness — Part E04: Colour fastness to perspiration
ISO 105-F01, Textiles — Tests for colour fastness — Part F01: Specification for wool adjacent fabric
ISO 105-F02, Textiles — Tests for colour fastness — Part F02: Specification for cotton and viscose adjacent fabrics
ISO 105-F03, Textiles — Tests for colour fastness — Part F03: Specification for polyamide adjacent fabric
ISO 105-F04, Textiles — Tests for colour fastness — Part F04: Specification for polyester adjacent fabric
ISO 105-F05, Textiles — Tests for colour fastness — Part F05: Specification for acrylic adjacent fabric
ISO 105-F06, Textiles — Tests for colour fastness — Part F06: Specification for silk adjacent fabric
ISO 105-F07, Textiles — Tests for colour fastness — Part F07: Specification for secondary acetate adjacent fabric
ISO 105-F10, Textiles — Tests for colour fastness — Part F10: Specification for adjacent fabric: Multifibre
ISO 2418, Leather — Chemical, physical, mechanical and fastness tests — Position and preparation of specimens
for testing
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 7906, Leather — Tests for colour fastness — General principles of testing
3 Terms and definitions
No terms and definitions are listed in this document.
IULTCS/IUF 426:2025(en)
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principle
The method uses an artificial perspiration solution to simulate 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 document will give results corresponding to
those with natural perspiration in most cases.
In general, human perspiration is weakly acidic when freshly produced. Microorganisms 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.
A leather test piece is soaked in artificial perspiration solution and a piece of adjacent fabric, also soaked in
artificial perspiration solution, is laid against each side to be tested. The composite test piece is left under
pressure for a specified time in a suitable apparatus. The leather test piece and adjacent fabric are then dried,
and the change in colour of the test piece and the staining of the adjacent fabric assessed with the grey scales.
Leathers with a finish may be tested intact or with the finish broken.
The general colour fastness testing principles shall be in accordance with those described in ISO 7906.
5 Apparatus
Ordinary laboratory apparatus and the following apparatus are used.
5.1 Test apparatus, consisting of a stainless-steel frame, into which a rectangular weight-piece
approximately 5 kg in mass and approximately 115 mm × 60 mm in cross-section fits accurately, so that a
uniform pressure of (12,5 ± 1,0 kPa) can be applied on the composite test piece placed between rectangular
plates of an inert material, e.g. glass or acrylic-resin, of the same length and width as the weight-piece and
approximately 1,5 mm thick.
The test apparatus shall be constructed so that if the weight-piece is removed during the tests, the pressure
of 12,5 kPa remains unchanged.
Other devices may be used provided that equivalent results are obtained.
NOTE Examples of suitable apparatus available commercially are given in Annex A.
5.2 Oven, maintained at 37 °C ± 2 °C.
5.3 Adjacent fabrics (see ISO 7906). Either
a) a multifibre adjacent fabric, conforming to ISO 105-F10, measuring approximately 100 mm × 40 mm, or
b) two single-fibre adjacent fabrics, conforming to the relevant specification in ISO 105-F01, ISO 105-F02,
ISO 105-F03, ISO 105-F04, ISO 105-F05, ISO 105-F06 or ISO 105-F07.
NOTE Examples of suitable commercial sources are given in Annex A.
5.4 Demineralized water, grade 3 in accordance with ISO 3696.
5.5 Alkaline artificial perspiration solution, containing, per litre of solution:
---------
...
ISO/IULTCS – IUF 426
Secretariat: ISO
Date: 2025-05-26
Leather — Tests for colour fastness — Colour fastness to perspiration
Cuir — Essais de solidité des coloris — Solidité des coloris à la sueur
FDIS stage
ISO #####-#:####(X/FDIS 11641:2025(en)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO #### 2025 – All rights reserved
ii
IULTCS/IUF 426:2025(en)
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
5 Apparatus . 2
6 Test pieces . 4
7 Procedure . 5
8 Evaluation . 5
9 Precision . 5
10 Test report . 5
Annex A (informative) Commercial sources for apparatus and materials . 7
Bibliography . 8
iii
ISO #####-#:####(X/FDIS 11641:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO'sISO’s adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
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).
This third edition cancels and replaces the second edition (ISO 11641:2012), which has been technically
revised.
The main changes are as follows:
— — update of normative references, in particular to ISO 2418 and to ISO 7906.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
© ISO #### 2025 – All rights reserved
iv
FINAL DRAFT International Standard ISO/FDIS 11641:2025(en)
IULTCS/IUF 426:2025(en)
Leather — Tests for colour fastness — Colour fastness to perspiration
1 Scope
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 7906, Leather 105-A02, Textiles — Tests for colour fastness — General principles of testing
ISO 105-A02, Textiles — Tests for colour fastness — Part A02: Grey scale for assessing change in colour
ISO 105--A03, Textiles — Tests for colour fastness — Part A03: Grey scale for assessing staining
ISO 105--A04, Textiles — Tests for colour fastness — Part A04: Method for the instrumental assessment of the
degree of staining of adjacent fabrics
ISO 105--A05, Textiles — Tests for colour fastness — Part A05: Instrumental assessment of change in colour for
determination of grey scale rating
ISO 105--E04, Textiles — Tests for colour fastness — Part E04: Colour fastness to perspiration
ISO 105--F01, Textiles — Tests for colour fastness — Part F01: Specification for wool adjacent fabric
ISO 105--F02, Textiles — Tests for colour fastness — Part F02: Specification for cotton and viscose adjacent
fabrics
ISO 105--F03, Textiles — Tests for colour fastness — Part F03: Specification for polyamide adjacent fabric
ISO 105--F04, Textiles — Tests for colour fastness — Part F04: Specification for polyester adjacent fabric
ISO 105--F05, Textiles — Tests for colour fastness — Part F05: Specification for acrylic adjacent fabric
ISO 105--F06, Textiles — Tests for colour fastness — Part F06: Specification for silk adjacent fabric
ISO 105--F07, Textiles — Tests for colour fastness — Part F07: Specification for secondary acetate adjacent
fabric
ISO 105--F10, Textiles — Tests for colour fastness — Part F10: Specification for adjacent fabric: Multifibre
ISO 2418, Leather — Chemical, physical, mechanical and fastness tests — Position and preparation of specimens
for testing
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods
ISO 7906, Leather — Tests for colour fastness — General principles of testing
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— — ISO Online browsing platform: available at https://www.iso.org/obp
— — IEC Electropedia: available at https://www.electropedia.org/
4 Principle
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 document will give results
corresponding to those with natural perspiration in most cases.
In general, human perspiration is weakly acidic when freshly produced. Micro-organismsMicroorganisms
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.
A leather test piece is soaked in artificial perspiration solution and a piece of adjacent fabric, also soaked in
artificial perspiration solution, is laid against each side to be tested. The composite test piece is left under
pressure for a specified time in a suitable apparatus. The leather test piece and adjacent fabric are then dried,
and the change in colour of the test piece and the staining of the adjacent fabric assessed with the grey scales.
Leathers with a finish may be tested intact or with the finish broken.
The general colour fastness testing principles shall be in accordance with those described in ISO 7906.
5 Apparatus
Ordinary laboratory apparatus and the following apparatus are used.
5.1 5.1 Test apparatus, consisting of a stainless-steel frame, into which a rectangular weight-piece
approximately 5 kg in mass and approximately 115 mm × 60 mm in cross-section fits accurately, so that a
uniform pressure of (12,5 ± 1,0 kPa) can be applied on the composite test piece placed between rectangular
plates of an inert material, e.g. glass or acrylic-resin, of the same length and width as the weight-piece and
approximately 1,5 mm thick.
The test apparatus shall be constructed so that if the weight-piece is removed during the tests, the pressure of
12,5 kPa remains unchanged.
Other devices may be used provided that equivalent results are obtained.
NOTE An exampleExamples of a suitable apparatus available commercially isare given in Annex AAnnex A.
5.2 5.2 Oven, maintained at 37 °C ± 2 °C.
5.3 5.3 Adjacent fabrics (see ISO 7906). Either
© ISO #### 2025 – All rights reserved
IULTCS/IUF 426:2025(en)
a) a) a multifibre adjacent fabric, conforming to ISO 105-F10, measuring approximately
100 mm × 40 mm, or
b) b) two single-fibre adjacent fabrics, conforming to the relevant specification in ISO 105-F01 to,
ISO 105-F02, ISO 105-F03, ISO 105-F04, ISO 105-F05, ISO 105-F06 or ISO 105-F07.
NOTE Examples of suitable commercial sources are given in Annex AAnnex A.
5.4 5.4 Demineralized water, grade 3 in accordance with ISO 3696:1987.
5.5 5.5 Alkaline artificial perspiration solution, containing, per litre of solution:
5,0 g of sodium chloride (NaCl),
5,0 g of tris(hydroxymethyl)aminomethane [NH C(CH OH) ],
2 2 3
0,5 g of urea [CO(NH ) ] and
2 2
0,5 g of nitrilotriacetic acid [N(CH COOH) ] (SAFETY NOTE — Not to be ingested),],
2 3
and adjusted to pH 8,0 ± 0,1 with hydrochloric acid (2 mol/l).
SAFETY NOTE WARNING — This artificial perspiration solution shall not be ingested. It shall not be
pipetted by mouth.
To prepare 1 litre of alkaline perspiration solution, dissolve the weighed-out components in approximately
900 ml of demineralized water (5.4(5.4)) in a 2 l beaker. Transfer to a 1 litrel volumetric flask (5.14(5.14))
and make up to volume with demineralized water. Check the pH of this solution with a pH meter (5.13(5.13))
and add 2 mol/l hydrochloric acid solution (5.15(5.15)) drop by drop until the pH reaches 8,0 ± 0,1. Smaller
volumes can be prepared as required.
Check the pH of the solution periodically and discard it if the pH is not within 8,0 ± 0,1. Also discard the
solution if colonies of microbes become visible.
NOTE The composition of this pH 8,0 alkaline perspiration solution differs from that specified in the textile method,
ISO 105-E04. Typically, leather test laboratories are small and this perspiration solution can be kept for some weeks
without changes in the pH. Instead, the ISO 105-E04 alkaline perspiration solution is not pH stable and a fresh solution
is prepared each day. Experience has shown that for colour fastness testing of leather the most important aspect in
making artificial perspiration solutions is the pH and not the composition. Once the perspiration solution is prepared, if
it is not completely used, it is preferred to store it in a refrigerator.
5.6 5.6 Acid artificial perspiration solution, if required, composition according to ISO 105-E04.
A freshly prepared solution using demineralized water (5.4(5.4),), containing, per litre:
0,5 g of L-histidine monohydrochloride monohydrate (C H O N ·HCl·H O);
6 9 2
...
PROJET FINAL
Norme
internationale
ISO/FDIS 11641
IULTCS
IUF 426
IULTCS
Cuir — Essais de solidité des coloris
Début de vote:
— Solidité des coloris à la sueur
2025-08-14
Leather — Tests for colour fastness — Colour fastness to Vote clos le:
perspiration 2025-10-09
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
NORMES POUVANT
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
NATIONALE.
Numéros de référence
IULTCS/IUF 426:2025(fr) © ISO 2025
PROJET FINAL
Norme
internationale
ISO/FDIS 11641
IULTCS
IUF 426
IULTCS
Cuir — Essais de solidité des coloris
Début de vote:
— Solidité des coloris à la sueur
2025-08-14
Leather — Tests for colour fastness — Colour fastness to
Vote clos le:
perspiration
2025-10-09
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
DOCUMENT PROTÉGÉ PAR COPYRIGHT
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
© ISO 2025 INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
NORMES POUVANT
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
NATIONALE.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Numéros de référence
Publié en Suisse ISO/FDIS 11641:2025(fr)
IULTCS/IUF 426:2025(fr) © ISO 2025
ii
IULTCS/IUF 426:2025(fr)
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 2
4 Principe. 2
5 Appareillage . 2
6 Éprouvettes. 4
7 Mode opératoire . 5
8 Évaluation . 5
9 Fidélité . 5
10 Rapport d’essai . 5
Annexe A (informative) Appareillages et matériaux disponibles dans le commerce . 7
Bibliographie . 8
iii
IULTCS/IUF 426:2025(fr)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes nationaux
de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité de
tout droit de propriété revendiqué à cet égard. À la date de publication du présent document, l’ISO n’avait pas
reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application. Toutefois,
il y a lieu d’avertir les responsables de la mise en application du présent document que des informations
plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à l’adresse
www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne pas avoir identifié tout ou partie de
tels droits de brevet.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion de
l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir www.iso.org/iso/avant-propos.
L’IULTCS est une organisation mondiale de sociétés professionnelles des industries du cuir fondée en 1897
ayant pour mission de favoriser l’avancement des sciences et technologies du cuir. L’IULTCS a trois
commissions, qui sont responsables de l’établissement des méthodes internationales d’échantillonnage et
d’essai des cuirs. L’ISO reconnaît l’IULTCS en tant qu’organisme international à activités normatives pour
l’élaboration de méthodes d’essai relatives au cuir.
Le présent document a été élaboré par la Commission des essais de solidité de l’Union internationale des
sociétés de techniciens et chimistes du cuir (commission IUF, IULTCS), en collaboration avec le comité
technique CEN/TC 289, Cuir, du Comité européen de normalisation (CEN), conformément à l’Accord de
coopération technique entre l’ISO et le CEN (Accord de Vienne).
Cette troisième édition annule et remplace la deuxième édition (ISO 11641:2012), qui a fait l’objet d’une
révision technique.
Les principales modifications sont les suivantes:
— mise à jour des références normatives, en particulier à l’ISO 2418 et à l’ISO 7906.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes se
trouve à l’adresse www.iso.org/members.html
iv
PROJET FINAL Norme internationale
IULTCS/IUF 426:2025(fr)
Cuir — Essais de solidité des coloris — Solidité des coloris à
la sueur
1 Domaine d’application
Le présent document spécifie une méthode permettant de déterminer la solidité des coloris à la sueur sur
les cuirs de toutes catégories, à toutes les phases du traitement. Elle s’applique particulièrement aux cuirs
destinés à la fabrication des gants, des vêtements et des parements, ainsi qu’aux cuirs pour les tiges de
chaussures sans doublure.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique. Pour
les références non datées, la dernière édition du document de référence s’applique (y compris les éventuels
amendements).
ISO 105-A02, Textiles — Essais de solidité des teintures — Partie A02: Échelle de gris pour l'évaluation des
dégradations
ISO 105-A03, Textiles — Essais de solidité des coloris — Partie A03: Échelle de gris pour l'évaluation des
dégorgements
ISO 105-A04, Textiles — Essais de solidité des teintures — Partie A04: Méthode instrumentale pour l'évaluation
du degré de dégorgement des tissus témoins
ISO 105-A05, Textiles — Essais de solidité des teintures — Partie A05: Évaluation instrumentale du changement
de couleur pour conversion en degrés de l'échelle de gris
ISO 105-E04, Textiles — Essais de solidité des coloris — Partie E04: Solidité des coloris à la sueur
ISO 105-F01, Textiles — Essais de solidité des teintures — Partie F01: Spécifications pour le tissu témoin en laine
ISO 105-F02, Textiles — Essais de solidité des teintures — Partie F02: Spécifications pour les tissus témoins en
coton et en viscose
ISO 105-F03, Textiles — Essais de solidité des teintures — Partie F03: Spécifications pour le tissu témoin en
polyamide
ISO 105-F04, Textiles — Essais de solidité des teintures — Partie F04: Spécifications pour le tissu témoin en
polyester
ISO 105-F05, Textiles — Essais de solidité des teintures — Partie F05: Spécifications pour le tissu témoin en
acrylique
ISO 105-F06, Textiles — Essais de solidité des teintures — Partie F06: Spécification pour le tissu témoin en soie
ISO 105-F07, Textiles — Essais de solidité des teintures — Partie F07: Spécifications pour le tissu témoin en
acétate secondaire
ISO 105-F10, Textiles — Essais de solidité des teintures — Partie F10: Spécification pour le tissu témoin:
Multifibre
ISO 2418, Cuir — Essais chimiques, physiques, mécaniques et essais de solidité — Emplacement et préparation
des spécimens pour les essais
IULTCS/IUF 426:2025(fr)
ISO 3696, Eau pour laboratoire à usage analytique — Spécification et méthodes d'essai
ISO 7906, Cuir — Essais de solidité des coloris — Principes généraux s’appliquant aux essais
3 Termes et définitions
Aucun terme n’est défini dans le présent document.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en normalisation,
consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l’adresse https:// www .electropedia .org/
4 Principe
La méthode utilise une solution de sueur artificielle afin de simuler la transpiration humaine. Attendu que la
sueur varie largement d’une personne à une autre, il n’est pas possible de concevoir une méthode ayant une
validité universelle, mais la sueur artificielle alcaline spécifiée dans le présent document donne des résultats
correspondant dans la plupart des cas à ceux obtenus avec la sueur naturelle.
En général, la sueur humaine est faiblement acide au début de la sudation. Ensuite, les micro-organismes la
modifient, le pH devenant généralement faiblement alcalin (pH compris entre 7,5 et 8,5). La sueur alcaline
exerce un effet beaucoup plus grand sur la couleur du cuir qu’une sueur acide. Par conséquent, pour simuler
les conditions les plus pénalisantes rencontrées dans la pratique, on utilise une solution alcaline pour les
cuirs de couleur.
Une éprouvette de cuir est trempée dans une solution de sueur artificielle et un morceau du tissu témoin,
également imbibé de solution de sueur artificielle, est placé contre chaque côté soumis à essai. L’éprouvette
composite est maintenue sous pression pendant un temps spécifié dans un appareillage approprié.
L’éprouvette de cuir et le tissu témoin sont ensuite séchés, et le changement de couleur de l’éprouvette et le
dégorgement sur le tissu témoin sont évalués à l’aide des échelles de gris.
Les cuirs finis peuvent être soumis à essai tels quels ou après enlèvement de la couche de finissage.
Les principes généraux s’appliquant aux essais de solidité des coloris doivent être conformes à ceux énoncés
dans l’ISO 7906.
5 Appareillage
L’appareillage courant de laboratoire et l’appareillage suivant sont utilisés.
5.1
...
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