| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ball-point pen in which a ball is hard to corrode even if a long term passage of time and which maintains smooth light feel of writing and light smooth lubricity. <P>SOLUTION: In the ball for the ball-point pen, a coating layer of salt of the amphoteric element is formed by making the salt of an amphoteric element contact the ball under the presence of supercritical carbon dioxide. <P>COPYRIGHT: (C)2012,JPO&INPIT |
