ISO 17236:2016
(Main)Leather - Physical and mechanical tests - Determination of extension set
Leather - Physical and mechanical tests - Determination of extension set
ISO 17236:2016 specifies a method for determining the extension set of leather. It is intended for use on upholstery leather but is applicable to all flexible leathers.
Cuir — Essais physiques et mécaniques — Détermination de la déformabilité
ISO 17236:2016 spécifie une méthode permettant de déterminer la déformabilité du cuir. Elle est destinée à être appliquée aux cuirs d'ameublement mais elle est également applicable à tous les cuirs souples.
General Information
- Status
- Published
- Publication Date
- 10-Feb-2016
- Technical Committee
- IULTCS - International Union of Leather Technologists and Chemists Societies
- Current Stage
- 9599 - Withdrawal of International Standard
- Start Date
- 21-May-2025
- Completion Date
- 30-Oct-2025
Relations
- Effective Date
- 27-Apr-2024
- Effective Date
- 04-Nov-2015
Overview
ISO 17236:2016 is an international standard specifying a method for determining the extension set of leather. Primarily intended for upholstery leather, the standard applies to all types of flexible leathers and focuses on physical and mechanical testing. The extension set measurement assesses the leather's permanent deformation after cyclic stretching, which is crucial for evaluating durability and performance under mechanical stress.
Developed by the International Organization for Standardization (ISO) in collaboration with the International Union of Leather Technologists and Chemists Societies (IULTCS) and the European Committee for Standardization (CEN), ISO 17236:2016 ensures consistency and reliability in leather testing globally. The standard outlines sample preparation, testing procedures, and how to express and report results for accurate quality control.
Key Topics
- Scope and Application: Evaluates extension set of upholstery and flexible leathers to determine permanent elongation after repeated stretching cycles.
- Sample Preparation: Defines cutting six test pieces, balanced across grain direction relative to the backbone-three parallel and three perpendicular-ensuring comprehensive directional data.
- Testing Apparatus:
- Tensile testing machine with precise force measurement (ISO 7500-1 accuracy).
- Thickness gauge compliant with ISO 2589.
- Press knife and ruler for sample cutting and measurement.
- Testing Procedure:
- Test pieces are cyclically extended to a force of 20.0 N ± 0.5 N at a controlled speed.
- After five stretch cycles, permanent extension is measured after a rest period of 60 seconds.
- Calculation of Extension Set: Results are reported as the percentage permanent extension relative to the original sample length.
- Test Reporting: Includes mean extension set values, thickness, conditioning atmosphere, any procedural deviations, and sample identification.
Applications
ISO 17236:2016 is essential for industries reliant on leather quality and durability, including:
- Upholstery Manufacturers: Assessing leather deformation characteristics under use conditions to ensure product longevity and comfort.
- Footwear and Apparel: Evaluating flexible leathers to predict performance and maintain mechanical integrity after repeated stress.
- Leather Tanneries and Laboratories: Providing standardized testing protocols for quality control and certification.
- Product Development: Informing material selection and treatment processes to optimize leather flexibility and resistance to extension set.
- Compliance and Certification: Meeting international testing requirements and benchmarks for leather goods sold globally.
By implementing this standard, manufacturers and testers gain reliable data on leather extension properties, facilitating improved product design and consumer satisfaction.
Related Standards
To effectively apply ISO 17236:2016, it is often used in conjunction with the following standards:
- ISO 2418 – Leather: Sampling location guidelines ensuring representative test samples.
- ISO 2419 – Leather: Sample preparation and conditioning protocols critical for test accuracy.
- ISO 2589 – Leather: Determination of thickness, a key parameter influencing mechanical behavior.
- ISO 7500-1 – Verification and calibration of force-measuring systems in tensile testing machines.
- ISO 2419:2012 – Conditioning atmospheres and environmental factors affecting leather testing.
These related standards form a comprehensive framework supporting mechanical testing, ensuring that results are reproducible, traceable, and standardized across international laboratories.
Ensuring adherence to ISO 17236:2016 enhances leather quality assessment through a validated method for extension set determination. This facilitates better evaluation of leather's mechanical performance, driving higher standards in product development, quality control, and regulatory compliance within the leather industry.
ISO 17236:2016 - Leather — Physical and mechanical tests — Determination of extension set Released:2/11/2016
ISO 17236:2016 - Cuir — Essais physiques et mécaniques — Détermination de la déformabilité Released:2/11/2016
Frequently Asked Questions
ISO 17236:2016 is a standard published by the International Organization for Standardization (ISO). Its full title is "Leather - Physical and mechanical tests - Determination of extension set". This standard covers: ISO 17236:2016 specifies a method for determining the extension set of leather. It is intended for use on upholstery leather but is applicable to all flexible leathers.
ISO 17236:2016 specifies a method for determining the extension set of leather. It is intended for use on upholstery leather but is applicable to all flexible leathers.
ISO 17236:2016 is classified under the following ICS (International Classification for Standards) categories: 59.140.30 - Leather and furs. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 17236:2016 has the following relationships with other standards: It is inter standard links to ISO 17236:2025, ISO 17236:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 17236:2016 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 17236
IULTCS/IUP 43
Second edition
2016-02-15
Leather — Physical and mechanical
tests — Determination of extension set
Cuir — Essais physiques et mécaniques — Détermination de la
déformabilité
Reference numbers
IULTCS/IUP 43:2016(E)
©
ISO 2016
IULTCS/IUP 43:2016(E)
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
IULTCS/IUP 43:2016(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 1
5 Sampling and sample preparation . 2
6 Procedure. 2
7 Expression of results . 3
8 Test report . 3
IULTCS/IUP 43:2016(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
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For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
ISO 17236 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, the secretariat of
which is held by UNI, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
It is based on IUP 43 which was published in J. Soc. Leather Tech. Chem. 84, p. 399, (2000) and confirmed
as an official method of the IULTCS in March 2001.
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 second edition cancels and replaces the first edition (ISO 17236:2002), of which i
...
NORME ISO
INTERNATIONALE 17236
IULTCS/IUP 43
Deuxième édition
2016-02-15
Cuir — Essais physiques et
mécaniques — Détermination de la
déformabilité
Leather — Physical and mechanical tests — Determination of
extension set
Numéros de référence
IULTCS/IUP 43:2016(F)
©
ISO 2016
IULTCS/IUP 43:2016(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2016, Publié en Suisse
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – Tous droits réservés
IULTCS/IUP 43:2016(F)
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Principe . 1
4 Appareillage . 1
5 Échantillonnage et préparation des échantillons . 2
6 Mode opératoire. 2
7 Expression des résultats. 3
8 Rapport d’essai . 3
IULTCS/IUP 43:2016(F)
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’attention est appelée sur le fait que certains des éléments du présent document peuvent faire l’objet de
droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
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Les appellations commerciales éventuellement mentionnées dans le présent document sont données
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un engagement.
Pour une explication de 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’OMC concernant les obstacles techniques au commerce (OTC), voir le lien suivant: Avant-propos —
Informations supplémentaires.
L’ISO 17236 a été élaborée par la Commission Essais physiques de l’Union internationale des sociétés de
techniciens et chimistes du cuir (Commission IUP, IULTCS) en collaboration avec le Comité technique
du Comité européen de normalisation (CEN) CEN/TC 289, Cuir, dont le secrétariat est tenu par l’UNI,
conformément à l’Accord de coopération technique entre l’ISO et le CEN (Accord de Vienne).
Elle est fondée sur le document IUP 43, qui a été publié dans le J. Soc. Leather Tech. Chem. 84, p. 399,
(2000) et confirmé en tant que méthode officielle de l’IULTCS en mars 2001.
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 de 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.
Cette deuxième édition annule et remplace la première édition (ISO 17236:2002), dont elle constitue
une révision mineure visant à aligner le point d) de l’Article 8 sur l’ISO 2419:2012.
iv © ISO 2016 – Tous droits réservés
NORME INTERNATIONALE
IULTCS/IUP 43:2016(F)
Cuir — Essais physiques et mécaniques — Détermination
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