ISO 20427:2023

Pigments and extenders — Dispersion procedure for sedimentation-based particle sizing of suspended pigment or extender with liquid sedimentation methods

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.

Titre manque

General Information

• Status: Published
• Publication Date: 20-Nov-2023
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: ISO/TC 256 - Pigments, dyestuffs and extenders
• Drafting Committee: ISO/TC 256/WG 7 - Functional pigments and extenders
• Current Stage: 6060 - International Standard published
• Start Date: 21-Nov-2023
• Due Date: 09-Feb-2024
• Completion Date: 21-Nov-2023

Standards Content (Sample)

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 2023

---------------------- Page: 1 ----------------------
ISO 20427:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© 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
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 2023 – All rights reserved

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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 .
...

INTERNATIONAL ISO
STANDARD 20427
First edition
Pigments and extenders — Dispersion
procedure for sedimentation-based
particle sizing of suspended pigment
or extender with liquid sedimentation
methods
PROOF/ÉPREUVE
Reference number
ISO 20427:2023(E)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO 20427:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© 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
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
PROOF/ÉPREUVE © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
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 Dispersing procedure .9
8.1 General .
...

DRAFT INTERNATIONAL STANDARD
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ISO/DIS 20427:2023(E)
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Secretariat: DIN
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ISO TC 256/WG 2
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Date: 2023-03-2709-29
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Pigments and extenders — Dispersion procedure for sedimentation-based particle sizing of
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suspended pigment or extender with liquid sedimentation methods
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ISO/DIS 20427:2023(E)
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© ISO 2023
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no
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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’sISO's member body in the country of the requester.
ISO copyright officeCopyright Office
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pt
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, geneva Geneva
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pt
Phone: + 41 22 749 01 11
Email: [e-mail]
Email: [e-mail]
Website: www.iso.orgwww.iso.org
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Published in Switzerland.
pt
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Formatted: English (United Kingdom)
ii © ISO 20222023 – All rights reserved

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ISO/DIS 20427:2023(E)
Formatted: Font: 11.5 pt
Formatted: Font: 11.5 pt
Contents
Foreword . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 3
5 Principles of dispersion . 4
5.1 Principles of ultrasonic dispersion . 4
5.2 Principle of wet jet mill dispersion . 4
5.3 Principle of shaker-based dispersion . 4
6 Principles of sedimentation-based techniques for particle size analysis . 5
6.1 Stokesian sedimentation analysis . 5
6.2 Disk-type centrifuges . 5
6.3 Cuvette-type centrifuges . 5
6.4 Gravitational sedimentation methods . 5
6.5 Centrifugal field-flow fractionation method . 6
7 Apparatus . 6
8 Dispersing procedure . 10
8.1 General .
...