| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide aqueous ink developing excellent scratch resistance and glossiness while retaining stability such as ejection stability and dispersion stability, and a watercolor pigment dispersion suitable for preparing the ink. <P>SOLUTION: This method for producing the watercolor pigment dispersion for preparing the aqueous ink for inkjet recording comprises the steps of spray-drying aqueous slurry containing fine organic pigment having 20-100 nm average particle diameter of primary particles to obtain an organic pigment powder, and mixing at least the organic pigment powder, a carboxy group-containing styrene-(meth)acrylic acid-based copolymer, a basic compound and water so that the water content becomes 60-95% in terms of mass to be dispersed. This method for producing the aqueous ink for inkjet recording comprises diluting the obtained watercolor pigment dispersion so that the content of the organic pigment becomes 1-10% in terms of mass. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
