Patent ID: 8252102
Filing Date: 2012-08-28
Classification: C09D

Abstract:
1. A water-based black ink for ink jet recording, comprising: a coloring agent; and water, wherein the coloring agent comprises a yellow dye, a magenta dye, and a cyan dye, the yellow dye comprises a dye (Y) represented by the following general formula (1), the magenta dye comprises a dye (M) represented by the following general formula (2), the cyan dye comprises at least one dye (C) selected from the group consisting of a compound represented by the structural formula (3-A), a compound represented by the structural formula (3-B), a compound represented by the structural formula (3-C), C.I. Direct Blue 199, C.I. Direct Blue 86, and C.I. Direct Blue 307, and the dye (Y), the dye (M), and the dye (C) are blended so as to satisfy the following conditions (a) and (b): (a) Y:M (weight ratio)=about 2:3 to about 3:2 (b) (Y+M):C (weight ratio)=about 2:1 to about 2:3 wherein in the general formula (1), R X Z M represents a hydrogen atom or a cation, wherein in the general formula (2), R R R R A wherein in the structural formulae (3-A), (3-B) and (3-C), Pc(Cu) represents a copper phthalocyanine nucleus represented by the general formula (Pc)