Water soluble ink composition and ink-jet recording device using same

Application Number  00128198 Application Date  2000.10.25
Publication Number  1297007 Publication Date  2001.05.30
Priority Information   1999/10/25 JP 302793/99  
Applicant(s) Name  Seiko Epson Corp.  
Inventor(s) Name  Kato Kenichi;Mukai Hiroshi  
Patent Agency Code  72001 Patent Agent  lin changan
AbstractA 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. Direct Red 227, and (C) a copper phthalocyanine dye at an (A)/(C) weight ratio of 1:11 to 1:50. A red one comprises (A), (B), and (C) a yellow dye at an (A)/(C) weight ratio of 1:2 to 1:4.