EN ISO 19403-7:2020

SLOVENSKI STANDARD
01-april-2020
Barve in laki - Omočljivost - 7. del: Merjenje stičnega kota na nagnjeni površini
(kot tečenja) (ISO 19403-7:2017)
Paints and varnishes - Wettability - Part 7: Measurement of the contact angle on a tilt
stage (roll-off angle) (ISO 19403-7:2017)
Beschichtungsstoffe - Benetzbarkeit - Teil 7: Messung des Kontaktwinkels bei
Neigetischexperimenten (Abrollwinkel) (ISO 19403-7:2017)
Peintures et vernis - Mouillabilité - Partie 7: Mesurage de l'angle de contact sur un plan
incliné (angle d'écroulement) (ISO 19403-7:2017)
Ta slovenski standard je istoveten z: EN ISO 19403-7:2020
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 19403-7
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 01.040.87
English Version
Paints and varnishes - Wettability - Part 7: Measurement
of the contact angle on a tilt stage (roll-off angle) (ISO
19403-7:2017)
Peintures et vernis - Mouillabilité - Partie 7: Mesurage Beschichtungsstoffe - Benetzbarkeit - Teil 7: Messung
de l'angle de contact sur un plan incliné (angle des Kontaktwinkels bei Neigetischexperimenten
d'écroulement) (ISO 19403-7:2017) (Abrollwinkel) (ISO 19403-7:2017)
This European Standard was approved by CEN on 4 November 2019.

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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19403-7:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 19403-7:2017 has been prepared by Technical Committee ISO/TC 35 "Paints and
varnishes” of the International Organization for Standardization (ISO) and has been taken over as
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 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
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.
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 19403-7:2017 has been approved by CEN as EN ISO 19403-7:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 19403-7
First edition
2017-06
Paints and varnishes — Wettability —
Part 7:
Measurement of the contact angle on a
tilt stage (roll-off angle)
Peintures et vernis — Mouillabilité —
Partie 7: Mesurage de l’angle de contact sur un plan incliné (angle
d’écroulement)
Reference number
ISO 19403-7:2017(E)
©
ISO 2017
ISO 19403-7:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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copyright@iso.org
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ii © ISO 2017 – All rights reserved

ISO 19403-7:2017(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 Sampling . 4
7 Procedure. 4
7.1 General for measuring the roll-off angle . 4
7.1.1 Setting up the contact angle measuring system . 4
7.1.2 Test conditions. 5
7.1.3 Conditioning of the test panels . 5
7.2 Measurement . 5
7.2.1 General. 5
7.2.2 Application of the drop . . 5
7.2.3 Determination of the roll-off angle . 6
8 Precision . 8
9 Test report . 8
Annex A (informative) Notes on sampling and treatment of test specimens .10
Annex B (informative) Factors influencing the roll-off angle .11
Bibliography .13
ISO 19403-7:2017(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 on 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 the following
URL: w w w . i s o .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.
A list of all parts in the ISO 19403 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved

ISO 19403-7:2017(E)
Introduction
Dynamic contact angles describe the processes on the interface liquid/solid during volume increase
(advancing angle) or volume decrease (receding angle) of a drop in horizontal position. As an alternative
to the static method (see ISO 19403-2), for the advancing angle always a surface area is wetted, which
was previously unwetted. For the receding angle, the contact angle during dewetting is observed. From
the difference between advancing angle and receding angle, information on chemical homogeneity and
roughness can be concluded. The receding angle is not suitable for the determination of the surface energy.
INTERNATIONAL STANDARD ISO 19403-7:2017(E)
Paints and varnishes — Wettability —
Part 7:
Measurement of the contact angle on a tilt stage (roll-off
angle)
1 Scope
This document specifies a method for the dynamic measurement of the roll-off angle of a liquid drop on
a solid surface. From the dynamic measurement, the advancing and receding angles of the drop rolling
off can also be determined. The roll-off angle plays a role when evaluating, for example, easy-to-clean
or anti-adherent surfaces.
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 amendments) applies.
ISO 4618, Paints and varnishes — Terms and definitions
ISO 19403-1, Paints and varnishes — Wettability — Part 1: Terminology and general principles
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4618, ISO
...