Patent ID: 8277549

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 a dye represented by the following general formula (1), and the ink further comprises a boron compound and at least one of amino polycarboxylic acid containing at least three carboxylic acid groups and amino polycarboxylate containing at least three carboxylate groups; wherein in the general formula (1), R 1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; R 2 represents a hydrogen atom, a halogen atom, or a cyano group; R 3 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; R 4 , R 5 , R 6 and R 7 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 4 , R 5 , R 6 , and R 7 may be the same or different, provided that R 4 and R 5 are not both hydrogen atoms, and that R 6 and R 7 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.