1. Scope
1.1 This guide describes the various procedures for determining the relative tinting strength of pigments and discusses the advantages and disadvantages of each procedure so that the best procedure may be selected for the application. 1.2 this guide is applicable only for camparing test pigments with a reference standard of the same type and grade and same dispersion method.
Currently there are several ASTM methods for determining the strength of colored or white pigments based on the type of dispersion technique used (i.e, mechanical Muller, miniature sandmill, etc. Also there are several methods for the actual caclculating the strength. The user, primarily in paint quality control laboratories needs information to be able to select the best method for determining the tint strength their particular application. Also, ASTM D1.26 wants to separate the Test Method for Dispersion from the Tint Strength Calculation. Thus they can write their dispersion method and point to the selected method given in this guide.
Keywords
tinting strength, white pigments, colored pigments, strength, visual, instrumental
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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