| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an ink composition for aqueous ballpoint pen that has sufficient lubricity and prevents occurrence of the corrosion of a ball and the wear of a holder.SOLUTION: An ink composition for aqueous ballpoint pen comprises at least one of phosphoric monoester of polyoxypropylene alkyl ether and phosphoric diester of polyoxypropylene alkyl ether.</p> |
