| abstract |
A water-based ballpoint pen comprising a specific aqueous ink, a ball, a ballpoint pen tip for holding said ball at a front end thereof and for discharging said ink from said top end portion, an ink follower following said ink with consumption of said ink, and an ink container directly containing said ink and said ink follower and for supplying said ink to said tip, said ink container communicating with a rear portion of said tip, wherein the ink follower comprises specific at least abase oil and a thickener. |