Patent ID: 7285159

Claim:
An ink jet ink comprising at least a coloring material comprising a compound represented by the general formula (I) or a salt thereof and a compound represented by the general formula (II): wherein R 1 represents a hydrogen atom, an alkyl group, a hydroxy lower alkyl group, a cyclohexyl group, a monoalkylaminoalkyl or dialkylaminoalkyl group, or a cyano lower alkyl group; and Y represents a chlorine atom, a hydroxyl group, an amino group, or a monoalkylamino or dialkylamino group which may have a substituent selected from the group consisting of a sulfonic group, a carboxyl group, and a hydroxyl group on an alkyl group; and R 2, R 3 , R 4 , R 5 , and R 6 each in dependently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a carboxyl group provided that R 2 , R 3 , R 4 , R 5 , and R 6 cannot simultaneously represent hydrogen atoms, wherein R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 , and R 16 each independently represent a hydrogren atom, an alkyl group having 1 to 8 carbon atoms, or a carboxyl group or a salt thereof that R 7 , R 8, R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 , and R 16 cannot simultaneously represent hydrogen atoms, and at least one of R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 , and R 16 represents a carboxyl group or a salt thereof; and X represents a chlorine atom, a hydroxyl group, an amino group, or a monoalkylamino or dialkylamino group which may have a substituent selected from the group consisting of a sulfonic group, a carboxyl group, and a hydroxyl group on an alkyl group.