SIST EN ISO 4045:2018

SLOVENSKI STANDARD
SIST EN ISO 4045:2018
01-september-2018
1DGRPHãþD
SIST EN ISO 4045:2008
8VQMH.HPLMVNRSUHVNXãDQMH'RORþHYDQMHS+LQUD]OLNDãWHYLO,62
Leather - Chemical tests - Determination of pH and difference figure (ISO 4045:2018)
Leder - Chemische Prüfungen - Bestimmung des pH und der Differenzzahl (ISO
4045:2018)
Cuir - Essais chimiques - Détermination du pH et de l'indice de différence (ISO
4045:2018)
Ta slovenski standard je istoveten z: EN ISO 4045:2018
ICS:
59.140.30 Usnje in krzno Leather and furs
SIST EN ISO 4045:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 4045:2018

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SIST EN ISO 4045:2018


EN ISO 4045
EUROPEAN STANDARD

NORME EUROPÉENNE

June 2018
EUROPÄISCHE NORM
ICS 59.140.30 Supersedes EN ISO 4045:2008
English Version

Leather - Chemical tests - Determination of pH and
difference figure (ISO 4045:2018)
Cuir - Essais chimiques - Détermination du pH et de Leder - Chemische Prüfungen - Bestimmung des pH
l'indice de différence (ISO 4045:2018) und der Differenzzahl (ISO 4045:2018)
This European Standard was approved by CEN on 5 May 2018.

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, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4045:2018 E
worldwide for CEN national Members.

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SIST EN ISO 4045:2018
EN ISO 4045:2018 (E)
Contents Page
European foreword . 3

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SIST EN ISO 4045:2018
EN ISO 4045:2018 (E)
European foreword
This document (EN ISO 4045:2018) has been prepared by Technical Committee 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 December 2018, and conflicting national standards
shall be withdrawn at the latest by December 2018.
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 4045:2008.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4045:2018 has been approved by CEN as EN ISO 4045:2018 without any modification.

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SIST EN ISO 4045:2018

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SIST EN ISO 4045:2018
INTERNATIONAL ISO
STANDARD 4045
IULTCS/IUC 11
Third edition
2018-05
Leather — Chemical tests —
Determination of pH and difference
figure
Cuir — Essais chimiques — Détermination du pH et de l'indice de
différence
Reference numbers
ISO 4045:2018(E)
IULTCS/IUC 11:2018(E)
©
ISO 2018

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SIST EN ISO 4045:2018
ISO 4045:2018(E)
IULTCS/IUC 11:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

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SIST EN ISO 4045:2018
ISO 4045:2018(E)
IULTCS/IUC 11:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Sampling and preparation of the samples . 2
8 Procedure. 2
8.1 Preparation of the extract . 2
8.2 Calibration of the pH meter . 3
8.3 Determination of the pH value . 3
8.4 Determination of the difference figure. 3
9 Test report . 3
© ISO 2018 – All rights reserved iii

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SIST EN ISO 4045:2018
ISO 4045:2018(E)
IULTCS/IUC 11:2018(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 ar
...