| 摘要 |
PROBLEM TO BE SOLVED: To solve problems, for example, that if a ball-point pen is used continuously for writing, a ball receiver wears, a ball in a ball holder retracts, and an ink circulation passage becomes narrower or is occluded, resulting in discharge failure of ink, or because of increase of friction due to direct contact of metal parts of the ball and the ball receiver, the ball-point pen's condition deteriorates and writing failure occurs such as generation of a writing of a dotted line due to rotation failure that the ball does not smoothly rotate and instantly stops.SOLUTION: The ink composition for ball-point pen comprises at least a color agent, a liquid medium, and a compound including polyvinyl phenol. |
