Reference number
ISO 8781-1:1990
ISO 8781-1:1990
© ISO 2024
International Standard
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
Edition 1
1990-11
1990-11
ISO 8781-1:1990
16201
Published
(Edition 1, 1990)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
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.
General information
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Status: PublishedPublication date: 1990-11Stage: International Standard confirmed [90.93]
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Edition: 1Number of pages: 5
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Technical Committee :ISO/TC 256ICS :87.060.10
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