| abstract |
(57) [Summary] [Purpose] High-quality printing with excellent discharge stability and high surface tension with little bleeding is obtained, and the fixing time on the printing paper is extremely short, and there is no overlap of colors during color printing. No ink offer. [Structure] A coloring agent, a coloring agent, a wetting agent for preventing the nozzle tip from drying, a resistivity adjusting agent for making the ink conductive, a solvent, and H- (CHCOOM-CHCO OM) a- (CH 2 CHCOOM) b- (CHCOOM -CHCOOM) c -H (where, M is -H, and / or alkali metal-substituted group, and / or, .a representing a -HN 4, b, and, c is, 0 <a + c ≦ 78,0 ≦ b ≦ It is an integer that satisfies 15. ) An ink containing a salt of a copolymer of acrylic acid and maleic acid represented by). |