| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an ink composition for an oily ball point pen refill, excellent in the writing quality, capable of restraining abrasion of a ball seat, and capable of restraining hanging-down of ink, for the problem of the present invention.SOLUTION: The present invention is the oily ball point pen refill for installing a ball point pen tip of rotatably embracing-holding a ball, and is the oily ball point pen refill of installing a ball point pen tip having a valve mechanism for making the ink flow out by imparting a clearance between an inner wall and a ball on the tip edge of a tip by pressing force in writing, by pressing the ball to the inner wall of the tip edge of the tip directly or via a pressing body by a coil spring, by filling the ink composition for the oily ball point pen including at least a coloring agent, an organic solvent and a salt-making body having an aromatic ring, and is formed as the oily ball point pen refill in which the salt-making body having the aromatic ring is a salt-making body of an anionic surfactant and a cationic surfactant.</p> |
