| 摘要 |
An aqueous ink composition comprising a water-soluble dye having the formula (I) in an amount sufficient for ink printing and water, <IMAGE> (I) <IMAGE> +TR <IMAGE> wherein R1 and R2 each represent hydrogen, a lower alkyl group, a lower alkoxy group or halogen; R3 represents hydrogen, a lower alkyl group, a lower alkoxy group, halogen, a sulfonic acid group or a sulfonate group; Z1 and Z2 each represent hydrogen, a lower alkyl group, a phenyl group, an acetyl group, an alkyl sulfonyl group, a benzoyl group which may have a substituent, a benzenesulfonyl group which may have a substituent, or a 1,3,5-triazine group which may have a substituent; M represents hydrogen, an alkali metal or NH4+; and n is an integer of 1 or 2.
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