| 摘要 |
<p>The development of a coloring matter that 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 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, carboxyl or benzoyl; R2 represents hydrogen or alkyl; and R3 and R4 represent each independently hydrogen, halogeno, alkyl or alkoxy.</p> |
