| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball point pen, with which blurring becomes hard to develop and smooth writing touch is given even when a thixotropic water-based ink including a pigment having comparatively larger particle diameter such as a bright pigment is employed. SOLUTION: In an ink housing part, a bright water-based ink 30 including an aluminum powder pigment is built. In addition, the water-based ink 3 has thixotropic properties. A writing ball is axially movable by 60 to 170 μm in a ball pen tip. |
