Patent ID: 8252102

Claim:
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 1 , R 2 , Y 1 , and Y 2 each represent a monovalent group, and R 1 , R 2 , Y 1 , and Y 2 may be the same or different; X 1 and X 2 each represent an electron attractive group, and X 1 and X 2 may be the same or different; Z 1 and Z 2 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, and Z 1 and Z 2 may be the same or different; and M represents a hydrogen atom or a cation, wherein in the general formula (2), R 11 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; R 12 represents a hydrogen atom, a halogen atom, or a cyano group; R 13 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; R 14 , R 15 , R 16 , and R 17 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted sulfonyl group, or a substituted or unsubstituted acyl group, and R 14 , R 15 , R 16 , and R 17 may be the same or different, provided that R 14 and R 15 are not both hydrogen atoms, and that R 16 and R 17 are not both hydrogen atoms; and A 1 and A 2 are both substituted or unsubstituted carbon atoms, or one of A 1 and A 2 is a substituted or unsubstituted carbon atom and the other is a nitrogen atom, 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)