| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an oil-based ink composition for a writing utensil which is excellent in solution stability against changes in environmental conditions such as temperature, humidity and the like and against the lapse of time and causes no defective writing such as blur and the like. <P>SOLUTION: The oil-based ink composition for a writing utensil comprises, at least, a dye, an organic solvent and an amideamine derivative represented by general formula (1) (wherein R<SB>1</SB>is a 1-21C alkyl group; R<SB>2</SB>and R<SB>3</SB>are each a 1-22C alkyl group; and n is an integer of 1-22), where the amideamine derivative represented by general formula (1) is contained in an amount of 0.1-20 wt.% in the whole ink composition and the dye bears a copper phthalocyanine structure. <P>COPYRIGHT: (C)2004,JPO</p> |
