EN ISO 11646:2014

SLOVENSKI STANDARD
01-maj-2014
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SIST EN ISO 11646:2000
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Leather - Measurement of area (ISO 11646:2014)
Leder - Flächenmessung (ISO 11646:2014)
Cuir - Mesurage de la surface (ISO 11646:2014)
Ta slovenski standard je istoveten z: EN ISO 11646:2014
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 11646
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2014
ICS 59.140.30 Supersedes EN ISO 11646:1998
English Version
Leather - Measurement of area (ISO 11646:2014)
Cuir - Mesurage de la surface (ISO 11646:2014) Leder - Flächenmessung (ISO 11646:2014)
This European Standard was approved by CEN on 11 January 2014.

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

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11646:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 11646:2014) has been prepared by 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 September 2014 and conflicting national standards shall be withdrawn
at the latest by September 2014.
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 11646:1998.
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, 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 11646:2014 has been approved by CEN as EN ISO 11646:2014 without any modification.

INTERNATIONAL ISO
STANDARD 11646
IULTCS/IUP 32
Second edition
2014-03-01
Leather — Measurement of area
Cuir — Mesurage de la surface
Reference numbers
ISO 11646:2014(E)
IULTCS/IUP 32:2014(E)
©
ISO 2014
ISO 11646:2014(E)
IULTCS/IUP 32:2014(E)
© ISO 2014
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
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
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Published in Switzerland
ii © ISO 2014 – All rights reserved

ISO 11646:2014(E)
IULTCS/IUP 32:2014(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 1
4.1 Mechanical pin-wheel area-measurement machine . 1
4.2 Circular calibration template . 1
4.3 Calibration procedure . 2
5 Sampling and sample preparation . 2
5.1 Conditioning of the leather . 2
5.2 Start of measurement . 2
5.3 Method of measurement . 2
5.4 Direction of feed . 3
5.5 Number of measurements . 3
6 Expression of results . 3
7 Test report . 3
Annex A (informative) Sources of test apparatus . 4
ISO 11646:2014(E)
IULTCS/IUP 32:2014(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 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 11646 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 289, Leather, in collaboration with the Physical Tests 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).
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 first edition of ISO 11646 was based on IUP 32 published in J Soc. Leather Tech. Chem. 73, pp. 23-24
(1989), and declared an official method of the IULTCS in October 1989.
This second edition of ISO 11646 cancels and replaces the first edition (ISO 11646:1993), which has
been technically revised in 4.2 and 5.1.2, to clarify the importance of using only one specific standard
atmosphere (20 °C and 65 % RH).
This International Standard is written in SI units, in accordance with ISO/IEC Directives. The use of the
square foot, still common in the leather trade in some countries, is discouraged. If, for commercial reasons,
the use of the square foot may seem necessary, it is obtained by the conversion 1 sq ft = 0,092 9 m .
iv © ISO 2014 – All rights reserved

INTERNATIONAL STANDARD ISO 11646:2014(E)
Leather — Measurement of area
1 Scope
This International Standard specifies a method of measuring the area of pieces of leather. It is intended
only for the measurement of dressed and other dry flexible leathers.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 2419, Leather — Physical and mechanical tests — Sample preparation and conditioning
3 Principle
The area of the conditioned leather is measured with a mechanical pin-wheel machine.
4 Apparatus
4.1 Mechanical pin-wheel area-measurement machine
The machine used should preferably have a feed-roller speed of 20 m/min ± 2 m/min. The distance
between the centres of the pins on two adjacent pin-wheels should preferably be 25,4 mm ± 2,5 mm
measured parallel to the axis of the pin-wheel roller. Pin-wheel machines which do not conform to these
recommendations may also be used, but the actual design values shall be stated in the test report. (See
Annex A for information on these machines.)
4.2 Circular calibration template
The template shall be made of flexible reinforced material, for calibrating the pin-wheel machine
immediately before the machine is used. The area of the template shall not be less than 5 % of the pin-
wheel machine capacity, and the width of the template shall not be greater than 50 % of the machine’s
working width.
The area of the template shall, if possible, be within ± 50 % of the anticipated area of the piece of leather
to be measured. If this is not possible, feed the same template through the machine a number of times
N without resetting the machine to zero until the total reading is within ± 50 % of the anticipated test-
specimen area, and treat this total as a single measurement.
When not in use, the template(s) shall be kept flat in the specific standard atmosphere defined in ISO 2419
(20 °C and 65 % RH). The area of the template(s) shall be verified at least once a year by an independent
body using measurement instruments traceable to a national standard calibration procedure. The
template is acceptable if its measured area is within ± 0,5 % of its nominal area.
It is
...