Patent ID: 7316739

Claim:
An ink set comprising a plurality of inks different in hues, wherein the plurality of inks includes a yellow ink containing a coloring agent that is a dye represented by the following general formula (2-1), the dye having a λmax of from 390 nm to 470 nm: wherein R 21 and R 23 each represent a hydrogen atom, alkyl group, cycloalkyl group, alkoxy group or aryl group; R 22 represents an aryl group or heterocyclic group; and one of X and Y represents a nitrogen atom and the other represents —CR 24 in which R 24 represents a hydrogen or halogen atom or a cyano, alkyl, alkylthio, alkylsulfonyl, alkylsulfinyl, alkyloxycarbonyl, carbamoyl, alkoxy, aryl, arylthio, arylsulfonyl, arylsulfinyl, aryloxy or acylamino group which may be further substituted; and a cyan ink containing a coloring agent represented by the following general formula (C-I): wherein X 1 , X 2 , X 3 and X 4 each independently represent —SO-Z 1 , —SO 2 Z 1 , —SO 2 NR 21 R 22 , —CONR 21 R 22 or —CO 2 R 21 in which Z 1 represents a substituted or unsubstituted alkyl, cycloalkyl, alkenyl, aralkyl, aryl or heterocyclic group; and R 21 and R 22 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl, cycloalkyl, alkenyl, aralkyl, aryl or heterocyclic group; Y 1 , Y 2 , Y 3 and Y 4 each independently represent a monovalent substituent; al to a4 and b1 to b4 each independently represent an integer of from 0 to 4 indicating the number of substituents X 1 to X 4 and Y 1 to Y 4 , with the proviso that al to a4 are not 0 at the same time and when al to a4 and b1 to b4 each represent an integer of not smaller than 2, the plurality of X 1 's to X 4 's and Y 1 's to Y 4 's may be the same or different; and M represents a hydrogen atom or a metal, atom, or oxide, hydroxide or halide thereof.