| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ink composition for pressurized ballpoint pens having excellent writing properties, little dropping inks, and suitable for writing with hands. <P>SOLUTION: This ink composition for pressurized ballpoint pens which each is made by attaching a tip comprising at least a ball and a holder to one side of the ink-receiving pipe, charging the ink into the ink-receiving pipe, and then charging a pressurized gas into the pipe from the back side to push the ink toward the tip is characterized by using an ink satisfying the following condition as the ink composition. The ink has an extended ink line length of ≤20 mm, when subjected to operations comprising test-writing the pressurized ballpoint pen, wiping the pen point, leaving the pen for 5 min., rubbing off the pen point on prescribed paper to a distance of one rotation, and then extending the applied ink with a prescribed eraser in the horizontal direction. <P>COPYRIGHT: (C)2004,JPO |
