SIST EN ISO 20427:2025
(Main)Pigments and extenders - Dispersion procedure for sedimentation-based particle sizing of suspended pigment or extender with liquid sedimentation methods (ISO 20427:2023)
Pigments and extenders - Dispersion procedure for sedimentation-based particle sizing of suspended pigment or extender with liquid sedimentation methods (ISO 20427:2023)
This document specifies sample preparation methods to determine the size distribution of separate particles of a single pigment or extender, which is dispersed in a liquid by application of a standardized dispersion procedure, using an ultrasonic device, shaker device or wet jet mill.
The sample preparation methods described are optimized for measurements carried out with a particle sizing technique based on sedimentation. This technique relies on particle migration due to gravitation or centrifugal forces and requires a density contrast between the particles and the liquid phase.
Pigmente und Füllstoffe - Dispergierverfahren zur sedimentativen Teilchengrößenbestimmung von suspendierten Pigmenten oder Füllstoffen mit Flüssigsedimentationsverfahren (ISO 20427:2023)
Dieses Dokument legt Verfahren zur Probenherstellung zum Bestimmen der Größenverteilung einzelner Teilchen eines einzelnen Pigmentes oder Füllstoffes fest, die durch Anwendung eines standardisierten Dispersionsverfahrens mit Hilfe eines Ultraschallgerätes, Schüttlers oder einer Nassstrahlmühle in einer Flüssigkeit dispergiert werden.
Die beschriebenen Verfahren zur Probenherstellung sind für Messungen optimiert, die mit einem auf Sedimentation beruhenden Verfahren zur Größenbestimmung der Teilchen durchgeführt werden. Dieses Verfahren geht von der Migration von Teilchen durch Schwerkraft oder Zentrifugalkräfte aus und erfordert einen Dichteunterschied zwischen den Teilchen und der Flüssigphase.
Pigments et matières de charge - Procédure de dispersion pour la granulométrie par sédimentation d'un pigment ou d'une charge en suspension à l'aide de méthodes de sédimentation en milieu liquide (ISO 20427:2023)
Le présent document décrit des méthodes de préparation d’échantillon pour la détermination de la distribution granulométrique de particules séparées d’un pigment ou d’une matière de charge unique, qui est dispersé(e) dans un liquide en appliquant un mode opératoire de dispersion normalisé à l’aide d’un dispositif à ultrasons, d’un agitateur ou d’un broyeur à jets en voie humide.
Les méthodes de préparation d’échantillon décrites sont optimisées pour les mesurages effectués avec une technique de détermination granulométrique basée sur la sédimentation. Cette technique repose sur la migration des particules due à la gravité ou aux forces centrifuges et nécessite un contraste de densité entre les particules et la phase liquide.
Pigmenti in polnila - Postopek disperzije za določanje porazdelitve velikosti delcev na podlagi sedimentacije suspendiranih pigmentov ali polnil v tekoči fazi (ISO 20427:2023)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2025
Pigmenti in polnila - Postopek disperzije za določanje porazdelitve velikosti delcev
na podlagi sedimentacije suspendiranih pigmentov ali polnil v tekoči fazi (ISO
20427:2023)
Pigments and extenders - Dispersion procedure for sedimentation-based particle sizing
of suspended pigment or extender with liquid sedimentation methods (ISO 20427:2023)
Pigmente und Füllstoffe - Dispergierverfahren zur sedimentativen
Teilchengrößenbestimmung von suspendierten Pigmenten oder Füllstoffen mit
Flüssigsedimentationsverfahren (ISO 20427:2023)
Pigments et matières de charge - Procédure de dispersion pour la granulométrie par
sédimentation d'un pigment ou d'une charge en suspension à l'aide de méthodes de
sédimentation en milieu liquide (ISO 20427:2023)
Ta slovenski standard je istoveten z: EN ISO 20427:2024
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 20427
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2024
EUROPÄISCHE NORM
ICS 87.060.10
English Version
Pigments and extenders - Dispersion procedure for
sedimentation-based particle sizing of suspended pigment
or extender with liquid sedimentation methods (ISO
20427:2023)
Pigments et matières de charge - Mode opératoire de Pigmente und Füllstoffe - Dispergierverfahren zur
dispersion pour la détermination granulométrique sedimentativen Teilchengrößenbestimmung von
basée sur la sédimentation des pigments ou matières suspendierten Pigmenten oder Füllstoffen mit
de charge en suspension par des méthodes de Flüssigsedimentationsverfahren (ISO 20427:2023)
sédimentation dans un liquide (ISO 20427:2023)
This European Standard was approved by CEN on 19 August 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 20427:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 20427:2023 has been prepared by Technical Committee ISO/TC 256 "Pigments,
dyestuffs and extenders” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 20427:2024 by Technical Committee CEN/TC 298 “Pigments and extenders” 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 2025, and conflicting national standards
shall be withdrawn at the latest by February 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.
Any feedback and questions on this document should be directed to the users’ national standards body.
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 20427:2023 has been approved by CEN as EN ISO 20427:2024 without any modification.
INTERNATIONAL ISO
STANDARD 20427
First edition
2023-11
Pigments and extenders — Dispersion
procedure for sedimentation-based
particle sizing of suspended pigment
or extender with liquid sedimentation
methods
Reference number
ISO 20427:2023(E)
ISO 20427:2023(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
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Published in Switzerland
ii
ISO 20427:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles of dispersion. 3
4.1 Principles of ultrasonic dispersion . 3
4.2 Principle of wet jet mill dispersion . 3
4.3 Principle of shaker-based dispersion . 3
5 Principles of sedimentation-based techniques for particle size analysis .4
5.1 Stokesian sedimentation analysis . 4
5.2 Disk-type centrifuges . 4
5.3 Cuvette-type centrifuges . . 4
5.4 Gravitation-based sedimentation methods . 4
5.5 Centrifugal field-flow fractionation method . 5
6 Apparatus . 5
7 Settings for dispersion .7
7.1 Procedure of ultrasonic dispersion using a probe-type sonicator . 7
7.2 Procedure of ultrasonic dispersion using a bath-type sonicator . 8
7.3 Procedure of shaker-based dispersion . 8
8 Dispersion procedure . 9
8.1 General . 9
8.2 Sampling for dispersion. 9
8.3 Reagents . 9
8.4 Recommendations for sample preparation. 10
9 Sampling .10
10 Measurement and expression of results .10
11 Test report .10
Annex A (normative) Protocol for the determination of energy input .12
Annex B (informative) Limits for ultrasonic dispersion procedure .15
Annex C (informative) Procedures for dispersion of TiO pigments .16
Annex D (informative) Procedure for dispersion of CaCO with wet jet milling .17
Annex E (informative) Procedure for the dispersion of Fe O with an ultrasonic probe .18
2 3
Annex F (informative) Procedure for dispersion of carbon black .19
Annex G (informative) General procedure for dispersion of pigment or extender .20
Bibliography .22
iii
ISO 20427:2023(E)
Foreword
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