| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aqueous pigment-based jet ink composition excellent in both pigment dispersion stability and ink jet stability, and to provide a method for producing the same. <P>SOLUTION: The jet ink composition essentially comprises a pigment polymerization-coated with a vinyl monomer giving an acrylic resin-based homo- or copolymer, a surfactant, a moisturizer as a polyhydric alcohol or its derivative, and water. Owing to selecting the coating resin composition and coating method constituting the key technology, the fine pigment particles can be stably dispersed over a long period in the aqueous medium containing the moisturizer using an ordinary surfactant rather than a resin dispersant, that is, owing to selecting the ink composition, both of good pigment dispersion and long-term ink jet stability can be secured and realized. Furthermore, use of this jet ink composition enables dense and clear inkjet printing and gives printed matter of high water resistance and scratch-proofness. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
