FprEN ISO 19403-3

SLOVENSKI STANDARD
oSIST prEN ISO 19403-3:2023
01-november-2023
Barve in laki - Omočljivost - 3. del: Določevanje površinske napetosti tekočin s
kapljično metodo (ISO/DIS 19403-3:2023)
Paints and varnishes - Wettability - Part 3: Determination of the surface tension of liquids
using the pendant drop method (ISO/DIS 19403-3:2023)
Beschichtungsstoffe - Benetzbarkeit - Teil 3: Bestimmung der Oberflächenspannung von
Flüssigkeiten mit der Methode des hängenden Tropfens (ISO/DIS 19403-3:2023)
Peintures et vernis - Mouillabilité - Partie 3: Détermination de la tension de surface des
liquides par la méthode de la goutte pendante (ISO/DIS 19403-3:2023)
Ta slovenski standard je istoveten z: prEN ISO 19403-3
ICS:
87.040 Barve in laki Paints and varnishes
oSIST prEN ISO 19403-3:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 19403-3:2023
oSIST prEN ISO 19403-3:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 19403-3
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:
2023-09-25 2023-12-18
Paints and varnishes — Wettability —
Part 3:
Determination of the surface tension of liquids using the
pendant drop method
Peintures et vernis — Mouillabilité —
Partie 3: Détermination de la tension superficielle des liquides par la méthode de la goutte pendante
ICS: 87.040
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
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NATIONAL REGULATIONS.
ISO/DIS 19403-3:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

oSIST prEN ISO 19403-3:2023
ISO/DIS 19403-3:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 19403-3
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:

Paints and varnishes — Wettability —
Part 3:
Determination of the surface tension of liquids using the
pendant drop method
Peintures et vernis — Mouillabilité —
Partie 3: Détermination de la tension superficielle des liquides par la méthode de la goutte pendante
ICS: 87.040
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
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WHICH REFERENCE MAY BE MADE IN
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 19403-3:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
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TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
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ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

oSIST prEN ISO 19403-3:2023
ISO/DIS 19403-3:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus and materials .1
6 Sampling . 3
7 Procedure .3
7.1 General . 3
7.1.1 Setting up the drop contour analysis device . 3
7.1.2 Test conditions . 4
7.2 Determination of the surface tension of the liquid . 4
7.2.1 Preparations . 4
7.2.2 Procedure . 4
8 Evaluation . 4
9 Precision . 5
9.1 General . 5
9.2 Repeatability limit, r . . 5
9.3 Reproducibility limit, R . 5
10 Test report . 5
Annex A (informative) Density of test liquids . 6
Annex B (informative) Shape parameter, B, and Worthington number . 7
Annex C (informative) Details of an interlaboratory test . 8
Bibliography .11
iii
oSIST prEN ISO 19403-3:2023
ISO/DIS 19403-3:2023(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 second edition cancels and replaces the first edition (ISO 19403-3:2017), which has been
technically revised.
The main changes are as follows:
— the Worthington number has been introduced in Annex B;
— the text has been editorially revised and the normative references have been updated.
A list of all parts in the ISO 19403 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
oSIST prEN ISO 19403-3:2023
DRAFT INTERNATIONAL STANDARD ISO/DIS 19403-3:2023(E)
Paints and varnishes — Wettability —
Part 3:
Determination of the surface tension of liquids using the
pendant drop method
1 Scope
This document specifies a test method to measure the surface tension of liquids with an optical method
using the pendant drop. The method can be applied for the characterization of liquid coating materials.
1)
The applicability can be restricted for liquids with non-Newtonian flow behaviour .
NOTE For other methods to determine the surface tension, see e.g. EN 14370 and ISO 1409.
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 2811 (all parts), Paints and varnishes — Determination of density
ISO 4618, Paints and varnishes — Vocabulary
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
ISO 19403-1, Paints and varnishes — Wettability — Part 1: Vocabulary and general principles
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4618 and ISO 19403-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principle
One drop of the respective liquids to be tested is captured hanging from a needle, where the drop shall
deviate significantly from the spherical shape due to its own mass. The surface tension is calculated
from the shape of the pendant drop in accordance with the Young-Laplace equation.
The polar and disperse fractions of the surface tension can be determined with at least two methods,
which are specified in ISO 19403-4 and ISO 19403-5.
5 Apparatus and materials
Ordinary laboratory apparatus, together with the following.
1) This term is defined in ISO 3219-1.
oSIST prEN ISO 19403-3:2023
ISO/DIS 19403-3:2023(E)
5.1 Drop contour analysis system, for measuring the surface tension of pendant drops.
Any state-of-the-art drop contour analysis system with digital image capture and analysis. Figure 1
shows a schematic example of a drop contour analysis system.
Key
1 light source
2 graduaded micro syringe
3 optical
...