Toluidine Red

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An organic color pigment used in printing inks. Toluidine Red is a dull scarlet shade of moderate tinctorial strength and possesses high lightfastness and alkali resistance, but does not withstand exposure to solvents and tends to discolor when exposed to heat. It is an inexpensive pigment, and is most effective undiluted and in water-based inks. (See also Organic Color Pigments.)

('CI Pigment Red 3 No. 12120'.)