NEW AZO COMPOUND, AQUEOUS SOLUTION, INK COMPOSITION, INK FOR INKJET RECORDING, INKJET RECORDING METHOD, INK CARTRIDGE FOR INKJET RECORDING, INKJET RECORDED MATTER AND METHOD FOR REDUCING FADING OF COLORED IMAGE

摘要

PROBLEM TO BE SOLVED: To provide a stable ink composition which has satisfactory hue as ink for black, wherein bronzing is suppressed.;SOLUTION: The aqueous solution comprises: (a) an antiseptic agent; and (b) an azo compound expressed by general formula (1) (in the formula, A denotes an aryl group or a nitrogen-containing five-membered heterocyclic group; G denotes a nitrogen atom or -C(R₂)=; R₂ denotes a hydrogen atom, a sulfo group, a carboxy group, a substituted or unsubstituted carbamoyl group or a cyano group; Y₂, Y₃ and Y₄ each independently denote a hydrogen atom or a monovalent substituted group; Y₂, Y₃ and Y₄ may be mutually linked to form a ring; M denotes a hydrogen atom or a monovalent counter cation; and n denotes 0, 1 or 2).;COPYRIGHT: (C)2012,JPO&INPIT