| abstract |
The object of the present invention is to have a high solubility in a medium containing water as a main component, to be stable even when a high-concentration aqueous solution is stored for a long period of time, to print a high-concentration solution, and to perform bronzing on an image printed with a high-concentration solution. Providing a black ink coloring matter and an ink composition thereof that does not occur and gives a black recorded image with excellent image fastness. An ink composition comprising, as a dye, at least both of the following formula (1) and a dye represented by a diazo compound having a specific structure having an unsubstituted or substituted 2-naphthothiazolyl group object. [Wherein, R a represents an unsubstituted alkyl group or the like, and X represents a substituted aliphatic amino group. ] [Selection figure] None |