ISO 8781-1:1990

Pigments and extenders — Methods of assessment of dispersion characteristics — Part 1: Assessment from the change in tinting strength of coloured pigments

Publication date: Nov 15, 1990

General information

Current stage: 90.93 Effective date: Mar 6, 2023

Originator: ISO

Owner: ISO/TC 256

Type: International Standard

ICS: 87.060.10

Languages: French English

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Status: Published

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Scope

Relates to coloured pigments which have been dispersed by one of the methods described in ISO 8780. The method is of general use for comparing similar pigments, for example a test pigment against an agreed reference pigment. The principle consists in dispersing the pigment in stages under specified conditions in an agreed binder system. After each dispersion stage, a portion of the mill base is taken and mixed separately with a white pigment to form a reduced paste. The tinting strength of each reduced paste is determined as described in ISO 787-24. The percentage increase in tinting strength between two dispersion stages is calculated in order to assess the ease of dispersibility of the pigment.

Life cycle

NOW

PUBLISHED
ISO 8781-1:1990
90.93 Standard confirmed
Mar 6, 2023

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