EN ISO 20566:2021

SLOVENSKI STANDARD
01-april-2021
Nadomešča:
SIST EN ISO 20566:2013
Barve in laki - Ugotavljanje odpornosti premaznega sistema proti razenju s
pomočjo visokotlačnega pranja v laboratoriju (ISO 20566:2020)
Paints and varnishes - Determination of the scratch resistance of a coating system using
a laboratory-scale car-wash (ISO 20566:2020)
Beschichtungsstoffe - Bestimmung der Kratzbeständigkeit von Beschichtungen mit einer
Labor-Automobilwaschanlage (ISO 20566:2020)
Peintures et vernis - Détermination de la résistance à la rayure d'un système de peinture
sur un poste de lavage automobile de laboratoire (ISO 20566:2020)
Ta slovenski standard je istoveten z: EN ISO 20566:2021
ICS:
43.020 Cestna vozila na splošno Road vehicles in general
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 20566
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2021
EUROPÄISCHE NORM
ICS 43.020; 87.040 Supersedes EN ISO 20566:2013
English Version
Paints and varnishes - Determination of the scratch
resistance of a coating system using a laboratory-scale car-
wash (ISO 20566:2020)
Peintures et vernis - Détermination de la résistance à la Beschichtungsstoffe - Bestimmung der
rayure d'un système de peinture sur un poste de lavage Kratzbeständigkeit von Beschichtungen mit einer
automobile de laboratoire (ISO 20566:2020) Labor-Automobilwaschanlage (ISO 20566:2020)
This European Standard was approved by CEN on 6 January 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20566:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 20566:2021) has been prepared by Technical Committee ISO/TC 35 "Paints and
varnishes" in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the
secretariat of which is held by DIN.
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 August 2021, and conflicting national standards shall
be withdrawn at the latest by August 2021.
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 20566:2013.
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 20566:2020 has been approved by CEN as EN ISO 20566:2021 without any modification.

INTERNATIONAL ISO
STANDARD 20566
Third edition
2020-05
Paints and varnishes —
Determination of the scratch
resistance of a coating system using a
laboratory-scale car-wash
Peintures et vernis — Détermination de la résistance à la rayure d'un
système de peinture sur un poste de lavage automobile de laboratoire
Reference number
ISO 20566:2020(E)
©
ISO 2020
ISO 20566:2020(E)
© ISO 2020
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.
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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 2020 – All rights reserved

ISO 20566:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
5 Washing suspension . 3
6 Sampling . 4
7 Test panels . 4
8 Procedure. 4
9 Evaluation . 5
10 Precision . 5
10.1 Repeatability limit r . 5
10.2 Reproducibility limit, R . 5
11 Test report . 5
Annex A (normative) Verification and calibration of the washing equipment .7
ISO 20566:2020(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 Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 9, General test methods for paints and varnishes, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 139, Paints and varnishes, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 20566:2013), which has been technically
revised. The main changes compared to the previous edition are as follows:
— the term “control panel” has been changed to “reference panel”;
— the requirement for the temperature of the washing suspension has been deleted;
— verification using a plastics panel has been added to Annex A;
— the text has been editorially revised and the normative references 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 2020 – All rights reserved

ISO 20566:2020(E)
Introduction
With this test procedure, it is important to note that the test results will not, over time, remain
constant, as a result of changes to the brush material. As the brush ages, the test will become more
severe. As a result, the test procedure is suitable only for comparative tests carried out at any one time
and using relatively short runs. Readings obtained using equipment which has accumulated different
total numbers of operating hours are not comparable with each other.
INTERNATIONAL STANDARD ISO 20566:2020(E)
Paints and varnishes — Determination of the scratch
resistance of a coating system using a laboratory-scale
car-wash
1 Scope
This document specifies a test procedure for assessing the scratch resistance of organic paint
coatings, in particular paint coatings used in the automotive industry (i.e. for assessing their car-
wash resistance). Machine-based washing is simulated in the laboratory environment using a rotating
brush and synthetic dirt. The test conditions have been designed to be as close as possible to the real
conditions in a car-wash. If the test parameters are suitably chosen, the method can also be used for
testing protective plastics films and plastics components.
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 ame
...