General methods of test for pigments and extenders — Part 14: Determination of resistivity of aqueous extract
|Publication Date:||1 March 2019|
|ICS Code (Pigments and extenders):||87.060.10|
This document specifies a general method of test for determining the electric resistivity (specific electric resistance) or the specific electric conductivity, respectively, of the aqueous extract of a pigment. The method is applicable to all pigments and extenders, except pigments that are soluble in water.
The resistivity of the aqueous extract of a pigment is considered as a property independent of the amount of water-soluble matter. If agreed, a cold extraction method can be used.