ISO/FDIS 20433

Leather — Tests for colour fastness — Colour fastness to crocking

This International Standard specifies a method for determining the amount of colour transferred from the surface of coloured leather to other surfaces by rubbing with a white cotton cloth. Two tests are carried out, one with a dry rubbing cloth and one with a wet rubbing cloth. The method is applicable to all types of coloured leather. Since after treatments of the leather as well as surface finishes can affect the degree of colour transfer, the test can be made before and/or after such treatments.

Cuir — Essais de solidité des coloris — Solidité des coloris au dégorgement par frottement

La présente Norme internationale spécifie une méthode permettant de déterminer la quantité de couleur transférée de la surface d'un cuir coloré à d'autres surfaces, par frottement au moyen d'une étoffe en coton blanc. Deux essais sont réalisés: l'un avec une étoffe de frottement à sec et l'autre avec une étoffe de frottement humide. Cette méthode s'applique à tous les types de cuir coloré. Étant donné que les post-traitements du cuir ainsi que les apprêts peuvent avoir une incidence sur le transfert de la couleur, l'essai peut être effectué avant et/ou après ces traitements.

General Information

• Status: Not Published
• ICS: 59.140.30 - Leather and furs
• Technical Committee: IULTCS - International Union of Leather Technologists and Chemists Societies
• Drafting Committee: IULTCS - International Union of Leather Technologists and Chemists Societies
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 24-Jan-2024
• Completion Date: 24-Jan-2024

Relations

• Revises: ISO 20433:2012 - Leather — Tests for colour fastness — Colour fastness to crocking
• Effective Date: 22-Apr-2023

Standards Content (Sample)

FINAL DRAFT
International
Standard
ISO/FDIS 20433
IULTCS
IUF 452
IULTCS
Leather — Tests for colour fastness
Voting begins on:
— Colour fastness to crocking
2024-01-24
Cuir — Essais de solidité des coloris — Solidité des coloris au Voting terminates on:
dégorgement par frottement 2024-03-20
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
ISO/FDIS 20433:2024(en)
IULTCS/IUF 452:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
FINAL DRAFT
ISO/FDIS 20433:2024(en)
International
Standard
ISO/FDIS 20433
IULTCS
IUF 452
IULTCS
Leather — Tests for colour fastness
Voting begins on:
— Colour fastness to crocking
Cuir — Essais de solidité des coloris — Solidité des coloris au
Voting terminates on:
dégorgement par frottement
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
COPYRIGHT PROTECTED DOCUMENT
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
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: [phone]
Email: [e-mail]
Website: www.iso.org
Reference numbers
Published in Switzerland ISO/FDIS 20433:2024(en)
IULTCS/IUF 452:2024(en) © ISO 2024

© ISO 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO/FDIS 20433:2024(en)
IULTCS/IUF 452:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus and materials . 2
6 Leather specimen and test pieces . 2
7 Procedure . 2
8 Evaluation . 2
9 Test report . 3
Annex A (informative) Apparatus and m
...

Date: 2023-12-14
ISO/FDIS 20433:2023(E)
IULTCS/IUF 452:2023
3rd edition
Secretariat: IULTCS ISO
Date: 2024-01-10
Leather — Tests for colour fastness — Colour fastness to crocking
Cuir — Essais de solidité des coloris — Solidité des teinturescoloris au dégorgement par frottement avec
abrasion
FDIS stage

---------------------- Page: 1 ----------------------
© ISO 2024
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
E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland

---------------------- Page: 2 ----------------------
ISO/FDIS 20433:2024(E)
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus and materials . 2
6 Leather specimen and test pieces . 2
7 Procedure . 2
8 Evaluation . 3
9 Test report . 3
Annex A (informative) Apparatus and materials . 4
A.1 Crockmeter . 4
A.2 Rubbing cloth . 4
A.3 Abnormal crock images . 4
Bibliography . 5


Annex A 4
© ISO 2024 – All rights reserved

iii

---------------------- Page: 3 ----------------------
Error! Reference source not found.ISO/FDIS 20433:2024(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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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 document should be noted. This document was drafted in accordance with the
edito
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