Patent ID: 8430953

Claim:
A water-based ink for ink-jet recording, comprising: a coloring agent; water; and a water-soluble organic solvent, wherein the coloring agent comprises the following a dye (1) and a dye (2): dye (1): a dye represented by the general formula (1) dye (2): at least one dye selected from the group consisting of dyes represented by the general formula (2a), dyes represented by the general formula (2b), C. I. Direct Blue 199, and C. I. Direct Blue 86 where in the general formula (1), rings A 1 , A 2 , and A 3 each represent a benzene ring, a 2,3-pyridine ring, or a 3,2-pyridine ring, at least one of the rings A 1 , A 2 , and A 3 is a 2,3-pyridine ring or a 3,2-pyridine ring, and the rings A 1 , A 2 , and A 3 may be identical to or different from each other; a satisfies 0≦a≦4, b satisfies 0≦b≦4, c satisfies 0≦c−4, and a, b and c satisfy 0≦a+b+c≦4; z is an integer satisfying 1≦z≦3; and R 0 is a straight chain alkyl group having 1 to 6 carbon atoms, where in the general formula (2a), Pc (Cu) represents a copper phthalocyanine nucleus represented by the following general formula (Pc); R 1 , R 2 , R 3 , and R 4 each represent a substituent selected from the group consisting of —SO 2 R a , —SO 2 NR b R c , and —CO 2 R a , R 1 , R 2 , R 3 , and R 4 are not all identical, at least one of R 1 , R 2 , R 3 , and R 4 has an ionic hydrophilic group as a substituent, and at least one of R 1 , R 2 , R 3 , and R 4 is present on any of the four benzene rings A, B, C, and D of the copper phthalocyanine nucleus represented by the general formula (Pc); R a represents a substituted or unsubstituted alkyl group, R b represents a hydrogen atom or a substituted or unsubstituted alkyl group, and R c represents a substituted or unsubstituted alkyl group; k satisfies 0<k<8, 1 satisfies 0<l<8, m satisfies 0≦m<8, n satisfies 0≦n<8, and k, l, m, and n satisfy 4≦k+l+m+n≦8, where in the general formula (2b), Pc (Cu) represents a copper phthalocyanine nucleus represented by the general formula (Pc): M represents lithium, sodium, potassium, or ammonium; x satisfies 0<x<4, y satisfies 0<y<4, and x and y satisfy 2≦x+y≦5; a SO 3 M group and a SO 2 NH 2 group are present on any of the four benzene rings A, B, C, and D of the copper phthalocyanine nucleus represented by the general formula (Pc),