EN ISO 3379:2024
(Main)Leather - Determination of distension and strength of surface (Ball burst method) (ISO 3379:2024)
Leather - Determination of distension and strength of surface (Ball burst method) (ISO 3379:2024)
This document specifies a test method for the determination of distension and strength of the leather grain or finished surface. This method is applicable to all flexible leathers and it is particularly suitable to determine the lastability of leathers for footwear uppers.
Leder - Bestimmung der Narbendehnfähigkeit und -bruchkraft (Lastometer-Methode) (ISO 3379:2024)
Dieses Dokument legt ein Prüfverfahren zur Bestimmung der Dehnfähigkeit und der Dehnbruchkraft des Narbens oder einer zugerichteten Oberfläche fest. Dieses Verfahren ist anwendbar auf alle flexiblen Lederarten und ist besonders zur Bestimmung der Aufzwickbarkeit von Schuhoberledern geeignet.
Cuir - Détermination de l'extension et de la résistance à la traction de la surface (méthode de la bille) (ISO 3379:2024)
Le présent document spécifie une méthode d’essai pour la détermination de l’extension et de la résistance à la traction de la fleur d’un cuir ou d’une surface finie. Cette méthode est applicable à tous les cuirs souples, et elle est particulièrement adaptée à la détermination de l’aptitude au montage des cuirs pour tiges d’articles chaussants.
Usnje - Ugotavljanje razteznosti in trdnosti površine (metoda s kroglico) (ISO 3379:2024)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2025
Usnje - Ugotavljanje razteznosti in trdnosti površine (metoda s kroglico) (ISO
3379:2024)
Leather - Determination of distension and strength of surface (Ball burst method) (ISO
3379:2024)
Leder - Bestimmung der Narbendehnfähigkeit und ‑bruchkraft (Lastometer-Methode)
(ISO 3379:2024)
Cuir - Détermination de l'extension et de la résistance à la traction de la surface
(méthode de la bille) (ISO 3379:2024)
Ta slovenski standard je istoveten z: EN ISO 3379:2024
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 3379
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2024
EUROPÄISCHE NORM
ICS 59.140.30 Supersedes EN ISO 3379:2015
English Version
Leather - Determination of distension and strength of
surface (Ball burst method) (ISO 3379:2024)
Cuir - Détermination de l'extension et de la résistance à Leder - Bestimmung der Narbendehnfähigkeit und -
la traction de la surface (méthode de la bille) (ISO bruchkraft (Lastometer-Methode) (ISO 3379:2024)
3379:2024)
This European Standard was approved by CEN on 1 November 2024.
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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3379:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 3379:2024) 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 May 2025, and conflicting national standards shall be
withdrawn at the latest by May 2025.
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 3379:2015.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 3379:2024 has been approved by CEN as EN ISO 3379:2024 without any modification.
International
Standard
ISO
IULTCS
IUP 9
Third edition
Leather — Determination of
2024-10
distension and strength of surface
(ball burst method)
Cuir — Détermination de l'extension et de la résistance à la
traction de la surface (méthode de la bille)
Reference numbers
ISO 3379:2024(en)
IULTCS/IUP 9:2024(en) © ISO 2024
ISO 3379:2024(en)
IULTCS/IUP 9:2024(en)
© 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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 3379:2024(en)
IULTCS/IUP 9:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus and material . 2
6 Specimen and test pieces preparation . 3
7 Procedure . 3
8 Test report . 4
Annex A (informative) Sources of apparatus . 6
iii
ISO 3379:2024(en)
IULTCS/IUP 9:2024(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 Physical Test 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 3379:2015), which has been technically
revised.
The main changes are as follows:
— the terminology and references are modified to be in line with ISO 2418:2023;
— Clause 6 has been re-arranged to make it easier to follow.
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 3379:2024(en)
International Standard
IULTCS/IUP 9:2024(en)
Leather — Determination of distension and strength of
surface (ball burst method)
1 Scope
This document specifies a test method for the determination of distension and strength of the leather
grain or finished surface. This method is applicable to all flexible leathers and it is particularly suitable to
determine the lastability of leathers for footwear uppers.
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, mechanical and fastness tests — Position and preparation of specimens
for testing
ISO 2419, Leather — Physical and mechanical tests —Specimen and test piece conditioning
ISO 2589, Leather — Physical and mechanical tests — Determination of thickness
ISO 15115, Leather — Vocabulary
EN 15987, Leather — Terminology — Key definitions for the leather trade
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 15115, EN 15987 and the
following apply.
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/
3.1
wearing surface
exposed or visible face of the leather when used in its intended application
Note 1 to entry: The wearing surface is usually the grain side of leather, however, the wearing surface of some leathers
may be otherwise dressed or finished, e.g. patent leather.
3.2
reverse side
opposite side to the wearing surface (3.1)
Note 1 to entry: The reverse side is usually the flesh side of leather.
3.3
crack
small surface splits or tears less than approximately 0,5 mm
ISO 3379:2024(en)
IULTCS/IUP 9:2024(en)
3.4
burst
complete rupture of the full thickness of the test piece
3.5
lastability
ability of a material to be stretched simultaneously in all directions (distended) without being damaged
4 Principle
A circular test piece is clamped around its edge and is gradually distended by forcing a steel metal ball,
attached to the end of a plunger, against the centre of the test piece on the reverse side. At certain distension,
measured in terms of distance travelled by the plunger, cracks appear on the wearing surface of the test
piece or it sustains other permanent physical damage; this distension is recorded as the cracking point or
first damage. At a h
...
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