EN ISO 11640:2012

SLOVENSKI STANDARD
01-junij-2013
1DGRPHãþD
SIST EN ISO 11640:2000
Usnje - Preskušanje obstojnosti barve - Obstojnost barve proti drgnjenju v dveh
nasprotnih smereh (ISO 11640:2012)
Leather - Tests for colour fastness - Colour fastness to cycles of to-and-fro rubbing (ISO
11640:2012)
Leder - Farbechtheitsprüfung - Bestimmung der Reibechtheit von Färbungen (ISO
11640:2012)
Cuir - Essais de solidité des teintures - Solidité des teintures au frottement en va-et-vient
(ISO 11640:2012)
Ta slovenski standard je istoveten z: EN ISO 11640:2012
ICS:
59.140.30 Usnje in krzno Leather and furs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 11640
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2012
ICS 59.140.30 Supersedes EN ISO 11640:1998
English Version
Leather - Tests for colour fastness - Colour fastness to cycles of
to-and-fro rubbing (ISO 11640:2012)
Cuir - Essais de solidité des coloris - Solidité des coloris au Leder - Farbechtheitsprüfung - Bestimmung der
frottement en va-et-vient (ISO 11640:2012) Reibechtheit von Färbungen (ISO 11640:2012)
This European Standard was approved by CEN on 14 November 2012.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11640:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 11640:2012) has been prepared by Technical Committee CEN/TC 289 “Leather", the
secretariat of which is held by UNI, in collaboration with the International Union of Leather Technologists and
Chemists Societies.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by May 2013, and conflicting national standards shall be withdrawn at the
latest by May 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11640:1998.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 11640:2012 has been approved by CEN as a EN ISO 11640:2012 without any modification.

INTERNATIONAL ISO
STANDARD 11640
IULTCS/IUF
Second edition
2012-11-15
Leather — Tests for colour fastness —
Colour fastness to cycles of to-and-fro
rubbing
Cuir — Essais de solidité des coloris — Solidité des coloris au
frottement en va-et-vient
Reference number
ISO 11640:2012(E)
IULTCS/IUF 450:2012(E)
©
ISO 2012
ISO 11640:2012(E)
IULTCS/IUF 450:2012(E)
©  ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 11640:2012(E)
IULTCS/IUF 450:2012(E)
Contents Page
Foreword . iv
1  Scope . 1
2  Normative references . 1
3  Principle . 1
4  Apparatus and materials. 2
5  Test specimens . 3
6  Conditioning of test specimens and pieces of felt . 3
6.1  Dry leather and dry felt . 3
6.2  Wet felt . 3
6.3  Wet leather . 3
6.4  Felt wetted with artificial perspiration solution . 3
7  Procedure . 4
8  Precision . 4
9  Test report . 5
Annex A (informative) Commercial sources for apparatus and materials . 6

ISO 11640:2012(E)
IULTCS/IUF 450:2012(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11640 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 289, Leather, in collaboration with the Fastness Tests Commission of the International Union of
Leather Technologists and Chemists Societies (IUF Commission, IULTCS), in accordance with the Agreement
on technical cooperation between ISO and CEN (Vienna Agreement).
The first edition was based on IUF 450 published in J. Soc. Leather Tech. Chem., 71, pp. 24-25 (1987), and
declared an official method of the IULTCS in October 1989.
This second edition cancels and replaces the first edition (ISO 11640:1993). This new version is a technical
update of the procedures and a revision of the definition of the wool felts (4.2). It includes the option for
instrumental grey scale measurement (7.8) and precision information (8).
IULTCS, originally formed in 1897, is a worldwide 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.
The rubbing of a leather surface with a wool felt is also known as the “VESLIC rub test”. VESLIC (Association
of Swiss Leather Chemists and Technologists) was the original developer of the test method and equipment.

iv © ISO 2012 – All rights reserved

ISO 11640:2012(E)
INTERNATIONAL STANDARD
IULTCS/IUF 450:2012(E)
Leather — Tests for colour fastness — Colour fastness to
cycles of to-and-fro rubbing
1 Scope
This International Standard specifies a method for determining the behaviour of the surface of a leather on
rubbing with a wool felt.
It is applicable to leathers of all kinds.
2 Normative references
The following referenced documents are indispensable for the application 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-A01, Textiles — Tests for colour fastness — Part A01: 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 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location
ISO 2419, Leather — Physical and mechanical tests — Sample preparation and conditioning
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods
ISO 4045, Leather — Chemical tests — Determination of pH
ISO 9073-2, Textiles — Test methods for nonwovens — Part 2: Determination of thickness
ISO 11641, Leather — Tests for colour fastness — Colour fastness to perspiration
3 Principle
One side of the leather specimen is rubbed with pieces of reference wool felt under a given pressure for a
given number of forward and backward motions.
The degree of colour staining of the wool felt and the change in colour of the leather are assessed with grey
scales. Any other visible change in, or damage to, the surface of the leather is also reported.
ISO 11640:2012(E)
IULTCS/IUF 450:2012(E)
The general colour fastness testing principles shall be in accordance with those described in ISO 105-A01,
taking into account that the substrate is leather.
4 Apparatus and materials
Ordinary laboratory apparatus and
4.1 Rub fastness test apparatus incorporating the elements specified in 4.1.1 to 4.1.3, and optionally
including those described in 4.1.4.
4.1.1 A carriage with:
a) a horizontal, completely planar metal platform;
b) a holder for fastening the leather to the platform, leaving approximately 80 mm exposed;
c) a device with which the leather may be extended at least 20 % linearly in the direction of rubbing.
4.1.2 A finger, 500 g  25 g in mass, removable, yet able to be fixed firmly in place and able to freely move
vertically, with:
a) a base measuring 15 mm  15 mm;
b) a device for attaching pieces of wool felt (4.2) to the base; the depth of the cavity shall be
3,9 mm  0,1 mm;
c) a weight-piece of mass 500 g  10 g to load the finger up to a total mass of 1 000 g  35 g;
d) means of lowering the finger with the base flat onto the test specimen.
4.1.3 Means for driving the carriage to and fro with a distance of travel of 35 mm to 40 mm at a
frequency of 40 cycles/min  2 cycles/min for the complete forward and backward motion.
4.1.4 Convenient, but not essential, elements as follows:
a) means of adjusting the position of the finger at right angles to the direction
...