| abstract |
(57) [Summary]n[PROBLEMS] To make red discoloration after standing for a long period of time unnoticeable, Aqueous that can provide recorded images giving the impression of colored black An ink composition is provided.nSOLUTION: The aqueous ink composition has a formula represented by the formula: (1):nEmbedded imagen [R 1 And R Two Is C1-4-alkyl, hydroxy, ami No, -SO Three M 1 , -CO Two M 1 Or -N = N-Ph-S O Three M 1 (Ph is phenyl) Is naphthyl; M 1 Is hydrogen or a cation) Zo dyes and formula (2):nEmbedded imagen (R Three Is hydroxy or CO Two M Two ; M Two Is hydrogen or kathio P; q and r are 0 to 4; however, p + q + r = 4) copper And phthalocyanine. |