A water-soluble ink composition comprising an optimum combination of a direct dye and an acid dye and having a high chroma and excellent resistance to water and light, and an ink jet recording apparatus using the same, are disclosed. A blue ink composition comprises (A) a xanthene magenta dye, (B) C.I....http://www.google.de/patents/US6508871?utm_source=gb-gplus-sharePatent US6508871 - Water-soluble ink composition and ink jet recording apparatus using same
