EN ISO 7784-3:2022

SLOVENSKI STANDARD
01-februar-2023
Nadomešča:
SIST EN ISO 7784-3:2016
Barve in laki - Ugotavljanje odpornosti proti obrabi - 3. del: Metoda s kolesom,
prekritim z brusilnim papirjem, in linearno izmenjajočim se preskusnim vzorcem
(ISO 7784-3:2022)
Paints and varnishes - Determination of resistance to abrasion - Part 3: Method with
abrasive-paper covered wheel and linearly reciprocating test specimen (ISO 7784-
3:2022)
Beschichtungsstoffe - Bestimmung des Abriebwiderstandes - Teil 3: Verfahren mit
schleifpapierbelegtem Rad und sich hin- und herbewegender Probe (ISO 7784-3:2022)
Peintures et vernis - Détermination de la résistance à l'abrasion - Partie 3: Méthode
utilisant une roue revêtue de papier abrasif et une éprouvette animée d'un mouvement
de va-et-vient linéaire (ISO 7784-3:2022)
Ta slovenski standard je istoveten z: EN ISO 7784-3:2022
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 7784-3
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2022
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 7784-3:2016
English Version
Paints and varnishes - Determination of resistance to
abrasion - Part 3: Method with abrasive-paper covered
wheel and linearly reciprocating test specimen (ISO 7784-
3:2022)
Peintures et vernis - Détermination de la résistance à Beschichtungsstoffe - Bestimmung des
l'abrasion - Partie 3: Méthode utilisant une roue Abriebwiderstandes - Teil 3: Verfahren mit
revêtue de papier abrasif et une éprouvette animée schleifpapierbelegtem Rad und sich hin- und
d'un mouvement de va-et-vient linéaire (ISO 7784- herbewegender Probe (ISO 7784-3:2022)
3:2022)
This European Standard was approved by CEN on 23 October 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, Türkiye 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 7784-3:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 7784-3:2022) 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 May 2023, and conflicting national standards shall be
withdrawn at the latest by May 2023.
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 7784-3:2016.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 7784-3:2022 has been approved by CEN as EN ISO 7784-3:2022 without any
modification.
INTERNATIONAL ISO
STANDARD 7784-3
Third edition
2022-09
Paints and varnishes — Determination
of resistance to abrasion —
Part 3:
Method with abrasive-paper covered
wheel and linearly reciprocating test
specimen
Peintures et vernis — Détermination de la résistance à l'abrasion —
Partie 3: Méthode utilisant une roue revêtue de papier abrasif et une
éprouvette animée d'un mouvement de va-et-vient linéaire
Reference number
ISO 7784-3:2022(E)
ISO 7784-3:2022(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
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 7784-3:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 S c op e . 1
2 Nor m at i ve r ef er enc e s . 1
3 Terms and definitions . 1
4 P r i nc iple . 2
5 Apparatus and materials .3
6 Te s t s p e c i men s . 4
6.1 P reparation of test specimens . 4
6 . 2 F i l m t h ic k ne s s . 5
6 . 3 C ond it ion i n g. 5
7 P r o c e du re .5
7.1 A g r e ement s . 5
7.2 Preparation of the abrasive wheel . 5
7. 3 Te s t c ond it ion s . 5
7.4 N umber of determinations . 5
7.5 G eneral test procedure . 5
7.6 P rocedure of the pre-test . 6
7.7 P rocedure of the main test . 6
8 E valuation of the main test .6
8.1 L oss in mass by abrasion . 6
8 . 2 A br a s ion r e s i s t a nc e . . . 7
9 P r e c i s ion . 7
9.1 G eneral . 7
9.2 R epeatability limit . 7
9.3 R eproducibility limit . 7
10 Te s t r ep or t . 8
Bibliography . 9
iii
ISO 7784-3:2022(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 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 7784-3:2016), which has been technically
revised.
The main changes are as follows:
— details of the materials for the precision data have been added in Table 2;
— ISO 7823-1 has been moved from Clause 2 to the Bibliography;
— the percentage of the repeatability and reproducibility limits have been removed from 9.2 and 9.3,
respectively.
A list of all parts in the ISO 7784 series can be found on the ISO website.
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 7784-3:2022(E)
Introduction
This document is one of the three parts of the ISO 7784 series dealing with t
...