EN ISO 5402-1:2022

SLOVENSKI STANDARD
01-junij-2022
Nadomešča:
SIST EN ISO 5402-1:2017
Usnje - Ugotavljanje odpornosti proti upogibanju - 1. del: Metoda fleksimetra (ISO
5402-1:2022)
Leather - Determination of flex resistance - Part 1: Flexometer method (ISO 5402-
1:2022)
Leder - Bestimmung der Dauerbiegefestigkeit - Teil 1: Flexometer-Verfahren (ISO 5402-
1:2022)
Cuir - Détermination de la résistance à la flexion - Partie 1: Méthode au flexomètre (ISO
5402-1:2022)
Ta slovenski standard je istoveten z: EN ISO 5402-1:2022
ICS:
59.140.30 Usnje in krzno Leather and furs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 5402-1
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2022
EUROPÄISCHE NORM
ICS 59.140.30 Supersedes EN ISO 5402-1:2017
English Version
Leather - Determination of flex resistance - Part 1:
Flexometer method (ISO 5402-1:2022)
Cuir - Détermination de la résistance à la flexion - Leder - Bestimmung der Dauerbiegefestigkeit - Teil 1:
Partie 1: Méthode au flexomètre (ISO 5402-1:2022) Flexometer-Verfahren (ISO 5402-1:2022)
This European Standard was approved by CEN on 20 March 2022.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5402-1:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 5402-1:2022) has been prepared by Technical Committee ISO/IULTCS
"International Union of Leather Technologists and Chemists Societies" in collaboration with Technical
Committee CEN/TC 289 “Leather” the secretariat of which is held by UNI.
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 October 2022, and conflicting national standards shall
be withdrawn at the latest by October 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 5402-1:2017.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 5402-1:2022 has been approved by CEN as EN ISO 5402-1:2022 without any
modification.
INTERNATIONAL ISO
STANDARD 5402-1
IULTCS
IUP 20
Third edition
2022-03
Leather — Determination of flex
resistance —
Part 1:
Flexometer method
Cuir — Détermination de la résistance à la flexion —
Partie 1: Méthode au flexomètre
Reference numbers
ISO 5402-1:2022(E)
IULTCS/IUP 20:2022(E)
ISO 5402-1:2022(E)
IULTCS/IUP 20:2022(E)
© ISO 2022
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 5402-1:2022(E)
IULTCS/IUP 20:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3  Terms and definitions . 1
4  Principle . 1
5  Apparatus and reagents .1
6  Sampling and sample preparation . 5
7  Procedure .6
8 Test report . 8
Annex A (informative) Sources of apparatus . 9
iii
ISO 5402-1:2022(E)
IULTCS/IUP 20:2022(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.
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).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
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 Physical Testing Commission of the International Union of Leather
Technologists and Chemists Societies (IUP 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 5402-1:2017), which has been technically
revised.
The main changes are as follows:
— an Introduction has been added;
— Figures 1 and 3 (previously Figure 1 in ISO 5402-1:2011) have been added;
— Clause 5 has been technically revised, in particular subclause 5.1.2 to allow the use of 2 types of
upper clamps;
— Clause 7 has been technically revised;
— a new bullet point c) has been added to the test report.
A list of all parts in the ISO 5402 series can be found on the ISO website.
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
ISO 5402-1:2022(E)
IULTCS/IUP 20:2022(E)
Introduction
This document describes a widely-used method with a flexing apparatus for determining the dry or wet
flex resistance of leather and finishes applied to leather. The number of flexing cycles chosen depends
on the end use of the leather and the expected performance. The leather specification normally defines
the number of flex cycles that the leather is required to achieve without damage. In addition, the flexing
process can be used as a pre-treatment for other test procedures.
This type of flexing apparatus was developed in 1963 and the flexing equipment described in this
document is available commercially from a range of manufacturers globally. The robust equipment is
typically used by tanneries and test laboratories for many decades. Over the years, small differences in
the geometry of the upper clamp (5.1.2) develop. In ISO 5402-1:2017 a modified upper clamp design was
introduced. In this document the upper clamp differences have been grouped together into 2 categories:
Specification 1 (as in ISO 5402-1:2017) and Specification 2 (as in ISO 5402-1:2011).
v
ISO 5402-1:2022(E)
INTERNATIONAL STANDARD
IULTCS/IUP 20:2022(E)
Leather — Determination of flex resistance —
Part 1:
Flexometer method
1 Scope
This document specifies a method for determining the dry or wet flex resistance of leather and finishes
applied to leather. It is applicable to all types of flexible leather below 3,0 mm in thickness.
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 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location
ISO 2419, Leather — Physical and mechanical tests — Sample preparati
...