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ISO/DIS 20427

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

General information

40.20     May 6, 2025

ISO

ISO/TC 256

International Standard

87.060.10  

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.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 20427:2023

NOW

IN_DEVELOPMENT
ISO/DIS 20427
40.20 DIS ballot initiated: 12 weeks
May 6, 2025

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