PMTA Violet

An organic color pigment used in printing inks. PMTA Violet is a bright blue violet possessing good lightfastness and heat resistance. It has good water resistance and resistance to some solvents, but does not withstand exposure to most solvents or soaps. Like other PMTA pigments, it is produced using a "triple salt" of phosphoric, molybdic, and tungstic acids. "Double salt" varieties using phosphoric acid and one of the two other acids can also be produced, though these tend to be stronger in color, but not as lightfast. (See also Organic Color Pigments.)

Also known as Methyl Violet ('CI Pigment Violet 3 No. 42535:2').

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