ANTHRAPYRIDONE COMPOUND, WATER-BASED MAGENTA INK COMPOSITIONAND METHOD OF INK-JET RECORDING

摘要

Anthrapyridonedisulfonic acid of formula (1) or salts thereof; aqueous magen ta ink compositions containing the acid or the salts; and an ink-jet recording method by using the same. The above compounds are excellent in water solubility, and the aqueous magenta ink compositions have good storage stability. Further, the ink-jet recording method can give records exhibiting highly reproducible, vivid hues and high resistances to light and water.