oSIST prEN ISO 17232:2025
(Main)Leather - Physical and mechanical tests - Determination of heat resistance of patent leather (ISO/DIS 17232:2025)
Leather - Physical and mechanical tests - Determination of heat resistance of patent leather (ISO/DIS 17232:2025)
ISO 17232:2017 specifies two methods for determining the heat resistance of patent leather.
Method A makes use of a modified lastometer, while Method B uses the "Zwik" apparatus. Both methods are applicable to patent leathers for all end uses.
Leder - Physikalische und mechanische Prüfungen - Bestimmung der Wärmebeständigkeit von Lackleder (ISO/DIS 17232:2025)
Cuir - Essais physiques et mécaniques - Détermination de la résistance à la chaleur des cuirs vernis (ISO/DIS 17232:2025)
ISO 17232:2017 spécifie deux méthodes permettant de déterminer la résistance à la chaleur du cuir vernis.
La méthode A met en ?uvre un lastomètre modifié, tandis que la méthode B utilise l'appareillage Zwik. Ces deux méthodes sont applicables aux cuirs vernis quelles que soient leurs utilisations finales.
Usnje - Fizikalni in mehanski preskusi - Ugotavljanje odpornosti lakastega usnja proti vročini (ISO/DIS 17232:2025)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2025
Usnje - Fizikalni in mehanski preskusi - Ugotavljanje odpornosti lakastega usnja
proti vročini (ISO/DIS 17232:2025)
Leather - Physical and mechanical tests - Determination of heat resistance of patent
leather (ISO/DIS 17232:2025)
Leder - Physikalische und mechanische Prüfungen - Bestimmung der
Wärmebeständigkeit von Lackleder (ISO/DIS 17232:2025)
Cuir - Essais physiques et mécaniques - Détermination de la résistance à la chaleur des
cuirs vernis (ISO/DIS 17232:2025)
Ta slovenski standard je istoveten z: prEN ISO 17232
ICS:
59.140.30 Usnje in krzno Leather and furs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 17232
IUP 38
IULTCS
Leather — Physical and mechanical
Secretariat: ISO
tests — Determination of heat
resistance of patent leather
Voting begins on:
2025-01-07
Cuir — Essais physiques et mécaniques — Détermination de la
Voting terminates on:
résistance à la chaleur des cuirs vernis
2025-04-01
ICS: 59.140.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
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BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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 SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 17232:2025(en)
IUP 38:2025(en)
ISO/DIS 17232:2025(en)
IUP 38:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii
ISO/DIS 17232:2025(en)
IUP 38:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Method A — Lastometer method . 1
4.1 Principle .1
4.2 Apparatus .1
4.3 Specimen and test piece preparation .2
4.4 Procedure .2
4.5 Test report .3
5 Method B — Zwik method . 3
5.1 Principle .3
5.2 Apparatus .3
5.3 Specimen and test piece preparation .5
5.4 Procedure .5
5.5 Test report .5
Annex A (informative) Sources of apparatus . 7
iii
ISO/DIS 17232:2025(en)
IUP 38:2025(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.
ISO 17232 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/
TC 289, Leather, the secretariat of which is held by UNI, in collaboration with the Physical Test Commission
of the International Union of Leather Technologists and Chemists Societies (IUP Commission, IULTCS), in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
It is based on IUP 38 published in J. Soc. Leather Tech. Chem., 84 (7), p. 403, (2000), and declared an official
method of the IULTCS in March 2001.
This third edition cancels and replaces the second edition (ISO 17232:2017), which has been technically
revised with the following changes:
— align it with the changes and revised terminology in ISO 2418:2023 and ISO 2419:2024;
— modification of the testing conditions (4.3 and 5.3).
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/DIS 17232:2025(en)
DRAFT International Standard
IUP 38:2025(en)
Leather — Physical and mechanical tests — Determination of
heat resistance of patent leather
1 Scope
This document specifies two methods for determining the heat resistance of patent leather.
Method A makes use of a modified lastometer, while Method B uses the “Zwik” apparatus. Both methods are
applicable to patent leathers for all end uses.
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 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 EN 15987 and ISO 15115 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/
4 Method A — Lastometer method
4.1 Principle
A perforated test piece is distended by a specified amount. The surface is heated and any damage to the
patent finish is noted.
4.2 Apparatus
4.2.1 Test machine, including the parts described in 4.2.1.1 to 4.2.1.4.
NOTE An example of a suitable apparatus available commercially is given in Annex A.
4.2.1.1 Clamp, capable of holding the test piece around its edge leaving free a central circular area
of diameter (25,0 ± 0,1) mm. The design of its clamping system shall ensure that the test piece does not
ISO/DIS 17232:2025(en)
IUP 38:2025(en)
slip under the test conditions and neither stretches nor compresses the central area as it is clamped. The
boundary between the free and clamped area shall be sharply defined.
4.2.1.2 Plunger, terminating in a steel ball of diameter (21,0 ± 0,1) mm.
4.2.1.3 Mechanism for thrusting the steel ball, without rotation against the test specimen.
4.2.1.4 Mechanism for monitoring the distension of the steel ball, (travel from zero) to an accuracy of
±0,05 mm.
4.2.2 Press knife, conforming to the requirements of ISO 2419 for cutting test pieces of suitable
dimensions for the test machine.
4.2.3 Sewing machine needle, sharp and undamaged, PCL size 80, either fitted into holder suitable for
use by hand or into sewing machine.
NOTE Other sized needles are used if they are more appropriate to the sewing used in the shoe production.
4.2.4 Hot air blower, capable of maintaining a temperature of (100 ± 5) °C or (125 ± 5) °C.
4.2.5 Temperature measuring device, reading to 1 °C.
4.2.6 Stopwatch, reading to 1 s.
4.2.7 Soft rubber mat, minimum thickness 10 mm.
4.3 Specimen and test piece preparation
4.3.1 Select the specimen in accordance with ISO 2418. Cut three test pieces by applying the press knife
(4.2.2) to the patent surface.
If there is a requirement for two or more hides or skins to be tested in one batch, then only one or two specimens
need to be taken from each hide or skin, provided that the overall total is not less than three test pieces.
4.3.2 If the test piece is to be perforated by hand, place the test piece on the soft rubber mat (4.2.7) with
the patent surface uppermost. Using the sewing machine needle (4.2.3) fitted into a holder, pierce a hole
vertically through the centre of the test piece so that the hole is within 1,0 mm of the centre. Pierce four
further holes through the test piece with each hole (5,0 ± 0,5) mm from the first hole so that the first holes
form a simple (Greek) cross. Ensure that the needle penetrates through the leather into the soft rubber mat.
4.3.3 If the test piece is to be perforated by machine, perforate through the centre using the needle fitted
into a sewing machine (4.2.3) running at normal speed but without the thread and set at 6 stitches/10 mm.
4.3
...
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