ISO/CD 20427

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

Scope

This document specifies methods for sample preparation to determine the size distribution of separate particles of a single pigment or extender, which is or is to be dispersed in a liquid by application of a standardized dispersion procedure using an ultrasonic device or a shaker device or a wet jet mill. The described sample preparation methods 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.