An organic color pigment used in printing inks. Permanent Red FRR is a strong, bright yellowish red possessing moderate lightfastness and high resistance to acids, alkalis, and soaps. It is used in letterpress and lithographic inks primarily for cartons (especially soap packaging). (See also Organic Color Pigments.)
Also known as Naphthol Red ('CI Pigment Red 2 No. 12310').