EN ISO 19403-5:2024

Paints and varnishes - Wettability - Part 5: Determination of the polar and dispersive fractions of the surface tension of liquids from contact angles measurements on a solid with only a disperse contribution to its surface energy (ISO 19403-5:2024)

This document specifies a test method to determine the polar and dispersive fractions of the surface tension of liquids by optical methods. The method can be applied for the characterization of liquid coating materials.
If applied to liquids with non-Newtonian flow behaviour (see ISO 3219-1:2021, 3.22), restrictions can apply.

Beschichtungsstoffe - Benetzbarkeit - Teil 5: Bestimmung des polaren und dispersen Anteils der Oberflächenspannung von Flüssigkeiten aus Kontaktwinkelmessungen auf einem Festkörper mit rein dispersem Anteil der Oberflächenenergie (ISO 19403-5:2024)

Dieses Dokument legt ein Prüfverfahren mit optischen Verfahren zum Bestimmen des polaren und dispersen Anteils der Oberflächenspannung von Flüssigkeiten fest. Das Verfahren kann zur Charakterisierung von flüssigen Beschichtungsstoffen eingesetzt werden.
Wenn das Verfahren für Flüssigkeiten mit nicht-newtonschem Fließverhalten (siehe ISO 3219 1:2021, 3.22) angewendet wird, können Einschränkungen auftreten.

Peintures et vernis - Mouillabilité - Partie 5: Détermination des fractions polaire et dispersive de la tension superficielle des liquides à partir de mesurages de l'angle de contact avec un solide n'ayant qu'une contribution de dispersion à son énergie de surface (ISO 19403-5:2024)

Le présent document spécifie une méthode d’essai permettant de déterminer les fractions polaire et dispersive de la tension superficielle des liquides à l’aide de méthodes optiques. Cette méthode peut être utilisée pour la caractérisation des produits de peinture liquides.
Si cette méthode est employée pour des produits liquides de comportement d’écoulement non newtonien, (voir l’ISO 3219-1:2021, 3.22), des restrictions peuvent s’appliquer.

Barve in laki - Omočljivost - 5. del: Določanje polarnega in disperznega dela površinske napetosti tekočin prek merjenja stičnih kotov na trdnih telesih s samo disperznim delom površinske energije (ISO 19403-5:2024)

Ta dokument določa preskusno metodo za določanje polarnega in disperznega dela površinske napetosti tekočin z optičnimi metodami. Metodo je mogoče uporabiti za določanje lastnosti tekočih premazov.
Pri uporabi metode z ne-newtonskimi tekočinami (glej standard ISO 3219-1:2021, točka 3.22) lahko veljajo omejitve.

General Information

• Status: Published
• Publication Date: 29-Oct-2024
• ICS: 87.040 - Paints and varnishes
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 30-Oct-2024
• Completion Date: 30-Oct-2024
• Ref Project: SIST EN ISO 19403-5:2025 - Paints and varnishes - Wettability - Part 5: Determination of the polar and dispersive fractions of the surface tension of liquids from contact angles measurements on a solid with only a disperse contribution to its surface energy (ISO 19403-5:2024)

Relations

• Replaces: EN ISO 19403-5:2020 - Paints and varnishes - Wettability - Part 5: Determination of the polar and dispersive fractions of the surface tension of liquids from contact angles measurements on a solid with only a disperse contribution to its surface energy (ISO 19403-5:2017)
• Effective Date: 21-Jun-2023

Overview

EN ISO 19403-5:2024 - Paints and varnishes - Wettability - Part 5 specifies an optical test method to determine the polar and dispersive fractions of the surface tension of liquids from contact angle measurements on a reference solid that has only a disperse contribution to its surface energy. The standard is intended mainly for the characterization of liquid coating materials and supports consistent, comparable wettability and surface-tension data for paints, varnishes and related products.

Key topics and requirements

• Scope: Optical determination of polar and dispersive surface-tension fractions; restrictions may apply for liquids with non-Newtonian behavior (see ISO 3219-1:2021).
• Principle: Four-step approach - (1) measure liquid surface tension (ISO 19403-3, EN 14370 or ISO 1409); (2) determine surface free energy of a dispersive reference solid (ISO 19403-2); (3) measure contact angle (static or dynamic) between liquid and reference solid (ISO 19403-2); (4) calculate dispersive and polar fractions using OWRK (Owens–Wendt–Rabel–Kaelble) or Wu methods.
• Reference solids: Use chemically and topologically homogeneous dispersive materials such as PTFE or paraffin. Recommended values: PTFE ≈ (18.5 ± 0.5) mJ/m and paraffin ≈ (25.5 ± 0.5) mJ/m (OWRK basis). Surface roughness R_a preferably < 0.3 µm.
• Test conditions: Standard ambient conditions - (23 ± 2) °C and relative humidity (50 ± 5) %; sampling according to ISO 15528.
• Data & evaluation: Calculate dispersive fraction (OWRK or Wu) then derive polar fraction from measured total surface tension. Use at least 10 drops per test liquid when determining reference solid energy.

Applications and users

• Coating formulators and R&D teams evaluating wetting and adhesion potential of liquid coatings.
• Quality control and testing laboratories establishing surface-tension parameters for batch acceptance and process control.
• Surface scientists and material suppliers characterizing liquids for adhesion, spreading, or substrate compatibility.
• Standards bodies and certification labs needing reproducible methods for reporting polar/dispersive contributions.

Practical uses include adhesive selection, primer evaluation, ink and paint spreading behavior, and predicting wetting performance on low-energy substrates.

Related standards

• ISO 19403-1, ISO 19403-2, ISO 19403-3 (wettability series)
• ISO 3219-1 (non-Newtonian fluids)
• ISO 15528 (sampling)
• ISO 1409, EN 14370 (surface tension measurements)
• ISO 4618, ISO 3270, ISO 21920-3, ISO 25178-2

Keywords: EN ISO 19403-5:2024, wettability, surface tension, contact angle, polar and dispersive fractions, paints and varnishes, OWRK method, Wu method, PTFE, paraffin.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2025
Nadomešča:
SIST EN ISO 19403-5:2020
Barve in laki - Omočljivost - 5. del: Določanje polarnega in disperznega dela
površinske napetosti tekočin prek merjenja stičnih kotov na trdnih telesih s samo
disperznim delom površinske energije (ISO 19403-5:2024)
Paints and varnishes - Wettability - Part 5: Determination of the polar and dispersive
fractions of the surface tension of liquids from contact angles measurements on a solid
with only a disperse contribution to its surface energy (ISO 19403-5:2024)
Beschichtungsstoffe - Benetzbarkeit - Teil 5: Bestimmung des polaren und dispersen
Anteils der Oberflächenspannung von Flüssigkeiten aus Kontaktwinkelmessungen auf
einem Festkörper mit rein dispersem Anteil der Oberflächenenergie (ISO 19403-5:2024)
Peintures et vernis - Mouillabilité - Partie 5: Détermination des fractions polaire et
dispersive de la tension superficielle des liquides à partir de mesurages de l'angle de
contact avec un solide n'ayant qu'une contribution de dispersion à son énergie de
surface (ISO 19403-5:2024)
Ta slovenski standard je istoveten z: EN ISO 19403-5:2024
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 19403-5
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2024
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 19403-5:2020
English Version
Paints and varnishes - Wettability - Part 5: Determination
of the polar and dispersive fractions of the surface tension
of liquids from contact angles measurements on a solid
with only a disperse contribution to its surface energy (ISO
19403-5:2024)
Peintures et vernis - Mouillabilité - Partie 5: Beschichtungsstoffe - Benetzbarkeit - Teil 5:
Détermination des fractions polaire et dispersive de la Bestimmung des polaren und dispersen Anteils der
tension superficielle des liquides à partir de mesurages Oberflächenspannung von Flüssigkeiten aus
de l'angle de contact avec un solide n'ayant qu'une Kontaktwinkelmessungen auf einem Festkörper mit
contribution de dispersion à son énergie de surface rein dispersem Anteil der Oberflächenenergie (ISO
(ISO 19403-5:2024) 19403-5:2024)
This European Standard was approved by CEN on 1 October 2024.

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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19403-5:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 19403-5:2024) 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 April 2025, and conflicting national standards shall be
withdrawn at the latest by April 2025.
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 19403-5:2020.
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 19403-5:2024 has been approved by CEN as EN ISO 19403-5:2024 without any
modification.
International
Standard
ISO 19403-5
Second edition
Paints and varnishes —
2024-10
Wettability —
Part 5:
Determination of the polar and
dispersive fractions of the surface
tension of liquids from contact
angles measurements on a solid
with only a disperse contribution to
its surface energy
Peintures et vernis — Mouillabilité —
Partie 5: Détermination des fractions polaire et dispersive de
la tension superficielle des liquides à partir de mesurages de
l'angle de contact avec un solide n'ayant qu'une contribution de
dispersion à son énergie de surface
Reference number
ISO 19403-5:2024(en) © ISO 2024

ISO 19403-5:2024(en)
© ISO 2024
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 19403-5:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reference solid . 2
6 Sampling . 2
7 Procedure . 2
7.1 Test conditions .2
7.2 Determination of the surface tension of the liquid to be tested .2
7.3 Determination of the surface free energy of the reference solid .2
7.4 Determination of the contact angle of the liquid to be tested on the reference solid .3
8 Ev a luat ion . 3
8.1 General .3
8.2 Owens-Wendt-Rabel-Kaelble method (OWRK method) .3
8.3 Wu method .3
8.4 Calculation of the polar fraction of the surface tension of the liquid .4
9 Test report . 4
Bibliography . 6

iii
ISO 19403-5:2024(en)
Foreword
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ISO draws attention to the possibility that the implementation of this document may
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