| 摘要 |
PURPOSE:To obtain the titled composition having excellent lubricity and capable of suppressing the abrasion between a tip ball holder and a ball, by adding a specific amount of a polysaccharide to a water-color ink composition containing a water-soluble organic solvent and a water-soluble dye. CONSTITUTION:A water-color ink composition containing a water-soluble organic solvent (e.g. ethylene glycol) and a water-soluble dye is added with 0.1-5.0wt.% of a polysaccharide (preferably glucuronoglucomannan or galactomannan) and, as necessary, 0.05-0.5wt.% of a rust-preventive such as benzotriazole. |
