| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oil-based ink composition for writing utensils capable of forming excellent handwriting without causing cissing even when written on the surface of a material of bad wettability such as a synthetic resin film or a kraft tape. <P>SOLUTION: The oil-based ink composition for the writing utensils comprises a colorant, an organic solvent and a polymer in which ≥1 mol% of (1) a polyamide having a betaine type amphoteric ion through an amide bond in the side chain or (2) a polyamide having the betaine type amphoteric ion through an amidomethylene bond in the side chain is present in the molecule. <P>COPYRIGHT: (C)2008,JPO&INPIT |
