| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink composition for ball-point pens which gives a smooth feeling of writing and smoothly drawn lines even at low temperatures, particularly is suited in use for pressure ball-point pens having excellent low temperature writing properties, and its manufacturing method. SOLUTION: The ink composition for ball-point pens which is composed of at least a coloring agent and a solvent comprises earthy graphite and a polyvinyl butyral resin. The viscosity of the above ink composition for ball-point pens is preferably 10,000 mPa sec to 40,000 mPa sec at 25°C. COPYRIGHT: (C)2004,JPO |
