Symuler Fast Red 4590 Naphthol AS 52-68-2; 5280-68-2 Dainippon Ink and Chemicals, Incorporated (DIC) Color pigment & dye Inks INKS >> Gravure Naphthol AS. Red pigment. Used in gravure inks. Naphthol AS. Red pigment. Used in gravure inks.