| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink composition which is used for pressurized ball point pens giving smooth writing touch and smooth drawn lines and especially has excellent temporal stability at high temperature. SOLUTION: This ink composition used for the pressurized ballpoint pens and comprising at least a colorant and a solvent is characterized by containing silica-containing aggregate and a phosphate. The viscosity of the ink composition used for the pressurized ballpoint pens is preferably 10,000 to 40,000 mPas at 25°C. COPYRIGHT: (C)2004,JPO |
