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
- Standard No.
- ISO 8781-1:1990
- Release Date
- 1990
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 8781-1:1990
- 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.
ISO 8781-1:1990 history
- 1990 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
