INK COMPOSITION, INK JET RECORD METHOD USING IT, AND COLORING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an ink composition which has stability even when it is stored for long time in a high density state, excellent in color tone of a printed image extremely, and gives a black colored record image excellent in various fastnesses of the printed image, especially ozone gas resistance.SOLUTION: There is provided an aqueous ink composition comprising: (A) a tetra azo color having a specific structure including two naphthalene skeletons; and (B) a color material expressed by the formula (2).