| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To markedly improve a dispersion property of an azo lake pigment for a lithographic ink which has poor water repellency because of its chemical structure and contains substances such as a rosin salt other than the pure pigment component, and to maintain the dispersion property of the azo lake pigment for the lithographic ink so as not to deteriorate with time. <P>SOLUTION: The surface of the pigment particle is treated with an O/W emulsion comprising a specific mixed fatty acid monoester and a specific long-chain aliphatic alcohol as film-forming substances which can form a uniform continuous film on the surface of a primary particle of the azo lake pigment and contributes to marked improvement of the dispersion property and to retention of the dispersion property with time. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
