| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aqueous blue pigment dispersion in which blue organic pigment fine particles are dispersed in a stable condition and to provide a blue inkjet ink containing the same which is excellent in stability. <P>SOLUTION: The aqueous blue pigment dispersion of the invention contains three kinds of materials which are a copper phthalocyanine blue pigment, a pigment derivative where a sulfonic acid group is introduced to this pigment, and water, and the derivative having 3 pieces of sulfonic acid group introduced therein accounts for at least 15% of the whole sulfonic acid-containing pigment derivative. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
