| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an oil-based ink composition containing a pigment and having excellent dispersibility and aging stability. <P>SOLUTION: The oil-based ink composition at least comprises one or more compounds selected from N-acylamino acid, N-acylmethyltaurine and N-acylmethylalanine, an acetylene-group hydrocarbon glycol and/or its alkylene oxide adduct, a solvent and a pigment. Since a pigment is used as a coloring agent in the ink composition, the image printed with the ink composition has excellent water resistance and light resistance. The pigment is finely dispersed for a long period and, accordingly, the ink causes little clogging trouble in the case of using in a ball-point pen, etc. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
