oSIST prEN ISO 20427:2024
(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)
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-junij-2024
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: prEN ISO 20427
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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
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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
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
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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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
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Any trade name used in this document is information given for the convenience of users and does not
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 256, Pigments, dyestuffs and extenders.
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
INTERNATIONAL STANDARD ISO 20427:2023(E)
Pigments and extenders — Dispersion procedure for
sedimentation-based particle sizing of suspended pigment
or extender with liquid sedimentation methods
1 Scope
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.
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 3696, Water for analytical laboratory use — Specification and test methods
ISO 9276-1, Representation of results of particle size analysis — Part 1: Graphical representation
ISO 13317-1, Determination of particle size distribution by gravitational liquid sedimentation methods —
Part 1: General principles and guidelines
ISO 13317-2, Determination of particle size distribution by gravitational liquid sedimentation methods —
Part 2: Fixed pipette method
ISO 13317-3, Determination of particle size distribution by gravitational liquid sedimentation methods —
Part 3: X-ray gravitational technique
ISO 13317-4, Determination of particle size distribution by gravitational liquid sedimentation methods —
Part 4: Balance method
ISO 13318-1:2001, Determination of particle size distribution by centrifugal liquid sedimentation methods
— Part 1: General principles and guidelines
ISO 13318-2, Determination of particle size distribution by centrifugal liquid sedimentation methods —
Part 2: Photocentrifuge method
ISO 13318-3, Determination of particle size distribution by centrifugal liquid sedimentation methods —
Part 3: Centrifugal X-ray method
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
ASTM D5965, Standard Test Methods for Density of Coating Powders
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO 20427:2023(E)
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/
3.1
nanoscale
length range from approximately 1 nm to 100 nm
Note 1 to entry: Properties that are not extrapolations from a larger size are predominantly exhibited in this size
range. For such properties, the size limits are considered approximate.
Note 2 to entry: The lower limit in this definition (approximately 1 nm) is introduced to avoid single and
small groups of atoms from being designated as nano-objects or elements of nanostructures, which can be
implied by the absence of a lower limit.
[SOURCE: ISO 80004-1:2023, 3.1.1 — modified, notes 1 and 2 to entry have been added.]
3.2
nanoparticle
nano-object with all external dimensions in the nanoscale (3.1) where the lengths of the longest and the
shortest axes of t
...
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