EN ISO 4531:2022

SLOVENSKI STANDARD
01-julij-2022
Nadomešča:
SIST EN ISO 4531:2018
Steklasti in porcelanski emajli - Sproščanje iz emajliranih izdelkov v stiku z živili -
Metode preskušanja in mejne vrednosti (ISO 4531:2022)
Vitreous and porcelain enamels - Release from enamelled articles in contact with food -
Methods of test and limits (ISO 4531:2022)
Emails - Freisetzung aus emaillierten Gegenständen für den Kontakt mit Lebensmitteln -
Prüfverfahren und zulässige Grenzwerte (ISO 4531:2022)
Émaux vitrifiés - Libération depuis les articles émaillés en contact avec les aliments -
Méthode d'essai et limites (ISO 4531:2022)
Ta slovenski standard je istoveten z: EN ISO 4531:2022
ICS:
25.220.50 Emajlne prevleke Enamels
67.250 Materiali in predmeti v stiku z Materials and articles in
živili contact with foodstuffs
97.040.60 Kuhinjska posoda, jedilni Cookware, cutlery and
servisi in jedilni pribor flatware
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4531
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2022
EUROPÄISCHE NORM
ICS 25.220.50; 67.250; 97.040.60 Supersedes EN ISO 4531:2018
English Version
Vitreous and porcelain enamels - Release from enamelled
articles in contact with food - Methods of test and limits
(ISO 4531:2022)
Émaux vitrifiés - Libération depuis les articles émaillés Emails - Freisetzung aus emaillierten Gegenständen für
en contact avec les aliments - Méthode d'essai et den Kontakt mit Lebensmitteln - Prüfverfahren und
limites (ISO 4531:2022) zulässige Grenzwerte (ISO 4531:2022)
This European Standard was approved by CEN on 13 April 2022.

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, 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4531:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 4531:2022) has been prepared by Technical Committee ISO/TC 107 "Metallic
and other inorganic coatings" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
the secretariat of which is held by BSI.
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 November 2022, and conflicting national standards
shall be withdrawn at the latest by November 2022.
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 4531:2018.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 4531:2022 has been approved by CEN as EN ISO 4531:2022 without any modification.

INTERNATIONAL ISO
STANDARD 4531
Second edition
2022-04
Vitreous and porcelain enamels —
Release from enamelled articles in
contact with food — Methods of test
and limits
Émaux vitrifiés — Libération depuis les articles émaillés en contact
avec les aliments — Méthode d'essai et limites
Reference number
ISO 4531:2022(E)
ISO 4531:2022(E)
© ISO 2022
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 4531:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Samples . 3
8 Preparation of samples .3
9 Test conditions .4
10 Procedure .4
10.1 Release test . 4
10.1.1 Release test lab apparatus . 4
10.1.2 Release from enamelled articles . 5
10.2 Sampling the release test solution for analysis (sample measuring solution) . . 5
11 Expression of results . 6
11.1 Reporting . 6
11.2 Test report . 6
Annex A (informative) Explanatory information on release limits . 8
Bibliography .10
iii
ISO 4531:2022(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 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.
This document was prepared by the European Committee for Standardization (CEN) Technical
Committee CEN/TC 262, Metallic and other inorganic coatings, including for corrosion protection and
corrosion testing of metals and alloys, in collaboration with ISO Technical Committee ISO/TC 107, Metallic
and other inorganic coatings, in accordance with the agreement on technical cooperation between ISO
and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 4531:2018), which has been technically
revised.
The main changes are as follows:
— the release limit and explanatory information on release limit for aluminium has been updated;
— the Bibliography has been updated;
— the requirement to carry out testing on the same day has been added;
— the requirements of test reports have been updated.
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 4531:2022(E)
Introduction
The release of metal-ions from enamelled articles requires effective means of control to ensure
protection against possible hazards arising from the use of improperly formulated, applied and fired
enamels and/or inorganic decorations on food contact surfaces of enamelled articles used for the
preparation, cooking, serving and storage of foodstuffs.
As a secondary consideration, different requirements from country to country for the control of the
release of ions from the surfaces of enamelled articles present non-tariff barriers to international trade
in these commodities. Accordingly, there is a need to establish internationally accepted methods of
tes
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