| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous pigment ink having high preservation stability and pigment dispersibility and capable of well ensuring print density and fretting resistance of a print even in the case of a recording medium such as plain paper in which an ink easily permeates. <P>SOLUTION: The nonaqueous pigment ink comprises a colorant and a nonaqueous solvent. In the ink, the colorant is a pigment composite of a pigment with a dispersant and an amine compound. Furthermore, the amine compound is a diamine and/or a triamine having ≥2 primary and/or secondary amino groups in one molecule and the dispersant is a dispersant containing ≥2 reactive functional groups having reactivity with the amino groups in the amine compound in one molecule. <P>COPYRIGHT: (C)2009,JPO&INPIT |
