| 摘要 |
PURPOSE:To obtain the titled ink composition slightly drying a pen point even if the cap is kept removed for a long time, by containing a coloring material, an organic solvent and a specific ascorbic acid derivative. CONSTITUTION:The aimed ink composition consisting of (A) preferably 2-17wt% coloring material (e.g. dye, pigment, etc.), (B) preferably 65-85wt% organic solvent (e.g. ethanol, methyl ethyl ketone, ethyl acetate, benzene, Cellosolve, etc.) and (C) preferably 0.5-3wt% compound (e.g. ascorbic acid, dipalmitate of ascorbic acid, magnesium salt of ascorbic acid phosphoric ester, etc.). |
