| 摘要 |
PROBLEM TO BE SOLVED: To provide a ballpoint pen tip, in which the 'dripping' phenomenon of a ballpoint pen is solved and problems such as the poor rotation of a ball and the poor delivery of an ink are hard to develop. SOLUTION: In the ballpoint pen tip consisting of the ball and at least a ball holder, at the tip part of which the ball is hugged, a film made of a fluorine-containing organosilane is formed on at least the tip outer peripheral part of the ball holder. |
