EN ISO 4625-1:2020

SLOVENSKI STANDARD
01-oktober-2020
Nadomešča:
SIST EN ISO 4625-1:2006
Veziva za barve in lake - Ugotavljanje zmehčišča - 1. del: Metoda s prstanom in
kroglico (ISO 4625-1:2020)
Binders for paints and varnishes - Determination of softening point - Part 1: Ring-and-ball
method (ISO 4625-1:2020)
Bindemittel für Beschichtungsstoffe - Bestimmung der Erweichungstemperatur - Teil 1:
Verfahren mit Ring und Kugel (ISO 4625-1:2020)
Liants pour peintures et vernis - Détermination du point de ramollissement - Partie 1:
Méthode de l'anneau et de la bille (ISO 4625-1:2020)
Ta slovenski standard je istoveten z: EN ISO 4625-1:2020
ICS:
87.060.20 Veziva Binders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4625-1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2020
EUROPÄISCHE NORM
ICS 87.060.20 Supersedes EN ISO 4625-1:2006
English Version
Binders for paints and varnishes - Determination of
softening point - Part 1: Ring-and-ball method (ISO 4625-
1:2020)
Liants pour peintures et vernis - Détermination du Bindemittel für Beschichtungsstoffe - Bestimmung der
point de ramollissement - Partie 1: Méthode de Erweichungstemperatur - Teil 1: Verfahren mit Ring
l'anneau et de la bille (ISO 4625-1:2020) und Kugel (ISO 4625-1:2020)
This European Standard was approved by CEN on 30 June 2020.

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 4625-1:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 4625-1:2020) 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 February 2021, and conflicting national standards
shall be withdrawn at the latest by February 2021.
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 4625-1:2006.
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 4625-1:2020 has been approved by CEN as EN ISO 4625-1:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 4625-1
Second edition
2020-07
Binders for paints and varnishes —
Determination of softening point —
Part 1:
Ring-and-ball method
Liants pour peintures et vernis — Détermination du point de
ramollissement —
Partie 1: Méthode de l'anneau et de la bille
Reference number
ISO 4625-1:2020(E)
©
ISO 2020
ISO 4625-1:2020(E)
© ISO 2020
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.
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 4625-1:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Sampling and preparation of test pieces . 2
5.1 Sampling . 2
5.2 Preparation of test pieces by the pour method. 2
5.2.1 Field of application . 2
5.2.2 Apparatus . 2
5.2.3 Procedure . 2
5.3 Preparation of test pieces from samples with a low softening point (up to 35 °C) . 2
5.3.1 Apparatus . 2
5.3.2 Procedure . 3
6 Materials (heating-bath liquids) . 3
7 Automated ring-and-ball method (reference method) . 3
7.1 Apparatus . 3
7.2 Calibration . 4
7.3 Procedure for materials with a softening point between 35 °C and 80 °C . 4
7.4 Procedure for materials with a softening point between 80 °C and 150 °C . 4
7.5 Procedure for materials with a softening point above 150 °C . 4
8 Manual ring-and-ball method (alternate method) . 4
8.1 Apparatus . 4
8.2 Calibration . 7
8.3 Procedure . 7
8.3.1 Procedure for materials with a softening point between 35 °C and 80 °C . 7
8.3.2 Procedure for materials with a softening point between 80 °C and 150 °C . 8
8.3.3 Procedure for materials with a softening point above 150 °C . 8
8.3.4 Procedure for materials with a softening point below 35 °C . 8
9 Expression of results . 8
10 Precision and bias . 8
10.1 Precision of the automated method . 8
10.1.1 General. 8
10.1.2 Precision data . 8
10.2 Precision of the manual method . 9
10.2.1 General. 9
10.2.2 Precision data . 9
10.3 Bias . 9
11 Test report .10
Bibliography .11
ISO 4625-1:2020(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, 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 4625-1:2004), which has been technically
revised. The main changes compared to the previous edition are as follows:
— the automated method has been classified to be the reference method;
— an introduction with information on all three methods described in the three parts of ISO 4625
series has been added;
— CAS-numbers have been added to the chemicals used;
— the text has been editorially revised;
— the normative references have been updated.
A list of all parts in the ISO 4625 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 2020 – All rights reserved

ISO 4625-1:2020(E)
Introduction
The ISO 4625 series specifies three widely used procedures for the measurement of the softening point
of rosin-based resins. This document presents the ring-and-ball method, which has been the accepted
standard for many years. ISO 4625-2 presents the Mettler cup-and-ball method. A new method, called
the Mettler method without the ball, is to be presented in a future document.
This document is still the only standard test method accepted in regulatory documents such as Title 21
of the Code of Federal Regulations (CFR) – Food and Drugs.
Other parts of the ISO 4625 series concern Mettler cup-and-ball methods. Although the recommended
testing conditions differ, the only difference between the equipment required in such methods is that
Mettler method without the ball does not use a ball. Surveys have shown that the Mettler cup-and-ball
method specified in ISO 4625-2 is the most widely used in the USA, while the Mettler method without
the ball is the most widely used in Europe. These methods are less time consuming than the ring-and-
ball manual method and the equipment is less expensive than the ring-and-ball automated method.
As a consequence of the thermoplastic nature of the test resins, the softening points obtained using the
recommended test conditions for all three methods are not generally the same. Consequently, the test
method and the testing conditions used should be noted in the final report.
INTERNATIONAL STANDARD ISO 4625-1:2020(E)
Binders for paints and varnishes — Determination of
softening point —
Part 1:
Ring-and-ball method
1 Scope
This document specifies the test methods for determining the softening point of resins (including rosin)
and similar materials by means of ring-and-ball apparatus.
Both manual and automated methods are specified, the automated method being the reference method.
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 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
IEC 60751, Industrial platinum resistance thermometer and platinum temperature sensors
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4618 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
softening point
temperature at which a disc of sample held within a horizontal ring is forced downward a distance of
25 mm under the weight of a steel ball as the disc is heated at a prescribed rate in a water, glycerol,
silicone oil, ethylene glycol/water or glycerol/water bath
4 Principle
In general, with materials of the types mentioned in Clause 1, softening does not take place at a definite
temperature. As the temperature rises, these ma
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