| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ink composition for a water-based ballpoint pen with wide practicality and obtaining good writing performance by using a specific compound for chemically removing a gas in the ink and a specific lubricant. <P>SOLUTION: The ink composition for a water-based ballpoint pen comprises at least a coloring agent, a water-soluble organic solvent, water, a shear viscosity depressant, a lubricant, and a foam suppressant, wherein the composition comprises a specific lubricant and a specific foam suppressant. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
