Patent ID: 7211134

Claim:
A dye mixture comprising a plurality of different dyes represented by the following formula (I): wherein M represents a hydrogen atom, a metal atom or an oxide, hydroxide or halide thereof; Pc represents a (k+l+m+n)-valent phthalocyanine nucleus represented by formula (II); X 1 , X 2 , X 3 and X 4 each independently represents a substituent selected from the group consisting of —SO—R 1 , —SO 2 —R 1 , —SO 2 NR 2 R 3 , —CONR 2 R 3 , —CO 2 —R 1 and CO—R 1 and each of four benzene rings {A, B, C and D in formula (II)} of the phthalocyanine nucleus has at its β-position at least one substituent of X 1 , X 2 , X 3 and X 4 , provided that the case where X 1 , X 2 , X 3 and X 4 all are the same is excluded and at least one of X 1 , X 2 , X 3 and X 4 has an ionic hydrophilic group as a substituent; R 1 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R 2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R 3 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; k, l, m and n represent an integer of 0<k<8, an integer of 0<l<8, an integer of 0≦m<8 and an integer of 0≦n<8, provided that k and/or l and/or m and/or n each independently represents a number satisfying 4≦k+l+m+n≦8; and Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 and Y 8 each independently represents a hydrogen atom and/or a monovalent substituent and these monovalent substituents each may further have a substituent.