| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an oily ink composition for a writing plate having excellent ink stability over time and excellent initial erasure properties and erasure properties over time of written and drawn line. <P>SOLUTION: The oily ink composition for the writing plate includes at least a pigment, a lower alcohol having a boiling point lower than 120°C, a polyvinyl butyral resin as a dispersant, a higher fatty acid ester as a peeling agent and a polyoxyethylene hydrogenated cured castor oil represented by formula of the figure as an erasure property adding agent. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
