| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ink composition excellent in ozone resistance and color development. <P>SOLUTION: This ink composition includes a colorant, an organic amine and a pH adjuster. The colorant includes at least one selected from the group consisting of a compound represented by general formula (b-1) or a salt thereof, and at least one selected from the group consisting of an octaazo compound having a triazine ring or a salt thereof. In the ink composition, the mass ratio of the colorant to the organic amine is 3.5:5 to 5:10, and the pH of the ink composition is 7-8. <P>COPYRIGHT: (C)2013,JPO&INPIT |
