EN ISO 7784-1:2023

SLOVENSKI STANDARD
01-maj-2023
Nadomešča:
SIST EN ISO 7784-1:2016
Barve in laki - Ugotavljanje odpornosti proti obrabi - 1. del: Metoda z brusilnim
papirjem na vrteči plošči in rotirajočimi preskušanci (ISO 7784-1:2023)
Paints and varnishes - Determination of resistance to abrasion - Part 1: Method with
abrasive-paper covered wheels and rotating test specimen (ISO 7784-1:2023)
Beschichtungsstoffe - Bestimmung des Abriebwiderstandes - Teil1: Verfahren mit
schleifpapierbelegten Rädern und rotierender Probe (ISO 7784-1:2023)
Peintures et vernis - Détermination de la résistance à l'abrasion - Partie 1: Méthode
utilisant des roues revêtues de papier abrasif et une éprouvette rotative (ISO 7784-
1:2023)
Ta slovenski standard je istoveten z: EN ISO 7784-1:2023
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 7784-1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 7784-1:2016
English Version
Paints and varnishes - Determination of resistance to
abrasion - Part 1: Method with abrasive-paper covered
wheels and rotating test specimen (ISO 7784-1:2023)
Peintures et vernis - Détermination de la résistance à Beschichtungsstoffe - Bestimmung des
l'abrasion - Partie 1: Méthode utilisant des roues Abriebwiderstandes - Teil1: Verfahren mit
revêtues de papier abrasif et une éprouvette rotative schleifpapierbelegten Rädern und rotierender Probe
(ISO 7784-1:2023) (ISO 7784-1:2023)
This European Standard was approved by CEN on 22 January 2023.

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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7784-1:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 7784-1:2023) 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 2023, and conflicting national standards shall
be withdrawn at the latest by August 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 7784-1:2016.
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 7784-1:2023 has been approved by CEN as EN ISO 7784-1:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 7784-1
Third edition
2023-02
Paints and varnishes — Determination
of resistance to abrasion —
Part 1:
Method with abrasive-paper covered
wheels and rotating test specimen
Peintures et vernis — Détermination de la résistance à l'abrasion —
Partie 1: Méthode utilisant des roues revêtues de papier abrasif et une
éprouvette rotative
Reference number
ISO 7784-1:2023(E)
ISO 7784-1:2023(E)
© ISO 2023
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 7784-1:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus and materials .2
6 Test specimens . 4
6.1 Preparation of the test specimens . 4
6.2 Film thickness . 4
6.3 Conditioning. 4
7 Procedure .5
7.1 Agreements . 5
7.2 Preparation of the abrasive wheels . 5
7.3 Test conditions . 5
7.4 Number of determinations . 5
7.5 Test procedure . 5
8 Ev a luat ion . 6
9 Precision . 6
10 Test report . 6
Bibliography . 8
iii
ISO 7784-1:2023(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 7784-1:2016), which has been technically
revised.
The main changes are as follows:
— Figures 1 and 2 have been updated;
— some measures in 5.1.4, 5.2.1 and in the note to 5.3 have been updated;
— the text has been editorially revised and the normative references have been updated.
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 7784-1:2023(E)
Introduction
This document is one of the three parts of ISO 7784 dealing with test methods for the determination
of the resistance to abrasion of coatings using abrasive wheels. The characteristics and differences of
these methods are summarized in Table 1.
Table 1 — Types of method
Abrasive wheel
Test specimen
Standard
movement
Type Degree of freedom
Abrasive paper on
ISO 7784-1
rubber wheel
Freely rotatable Rotation
ISO 7784-2 Abrasive rubber wheel
Rigid – with
Abrasive paper on
ISO 7784-3 stroke-dependent Linear reciprocation
metal wheel
a
rotation
a
A mechanism rotates the abrasive wheel
...