| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an oily ink composition for a marking pen that has excellent pigment dispersibility, can hardly generate aggregation or precipitation of the pigment after aging, and continuously produces good writing. <P>SOLUTION: The oily ink composition used for a marking pen comprises at least a pigment, an organic solvent, a resin, and succinimide. Furthermore, 0.3-10 mass% of the succinimide is contained in the total amount of the ink composition. As the organic solvent, an organic solvent selected from an aliphatic hydrocarbon, an alicyclic hydrocarbon, and an aromatic hydrocarbon is used as a main solvent. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
