Anthrapyridone compounds, water-based ink composition, and articles colored therewith

摘要

PCT No. PCT/JP97/03204 Sec. 371 Date Feb. 3, 1999 Sec. 102(e) Date Feb. 3, 1999 PCT Filed Sep. 11, 1997 PCT Pub. No. WO98/11167 PCT Pub. Date Mar. 19, 1998The present invention relates to the development of a coloring matter which has a moderately bluish magenta color and an excellent lightfastness and can provide a wide range of color tones in the visible range when used together with yellow and cyan inks. A water-base ink composition or the like is prepared by using a sulfonic acid derivative of an anthrapyridone compound represented by general formula (I) as a magenta dye, wherein R1' represents alkoxycarbonyl, carbonyl or benzoyl; R2 represents hydrogen or alkyl; and R3 and R4 represent each independently hydrogen, halogeno, alkyl or alkoxy.