15 сентября, 2015 
Pokraskin pH values are typically made using 10% pigment slurries in degassed distilled water (ASTM D1208 Procedure 6.1.1). Addition of a small, controlled amount of salt (e. g. reagent grade KCl) improves the electrode response. A blank should be run to verify proper degassing and technique. CO2 absorption decreases the pH.
In the absence of better techniques to prevent CO2 absorption, measurements are only accurate to 0.5 pH units.
Most of the titanate pigments have neutral pH values. Treated pigments that utilize certain mineralizers, modifiers, oxidizers, or additives can have acidic or basic character and exhibit pH values in the range of 4-10. The pigment pH can be important in some applications such as acid-catalyzed paint systems.
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