| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a ballpoint pen free from blurring in handwriting and which having a low writing resistance. <P>SOLUTION: The ballpoint pen includes ink containing at least a dye and having a pH of 2-4, and a ballpoint pen tip having a ball made of a material containing a single chromium and/or a chromium compound of less than 2.5 wt% and a titanium and/or a titanium compound of less than 10%, as a writing member. <P>COPYRIGHT: (C)2004,JPO |
