| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink follower for a ball-point pen using a water base ink which has stable followability independent of pen body specifications, a writing flow rate, and a writing speed in addition to properties for preventing the evaporation and leakage of the ink follower and does not cause the back flow of ink caused by the shortage of the ink follower during writing, the scattering of the ink follower by impact applied to a pen body, and the inversion between the ink and the ink follower and the ball-point pen using a water base ink having the ink follower. SOLUTION: The ink follower for the ball-point pen using a water base ink which has the value of tanδ in a frequency region 0.1-650 rad/sec in angular frequency at 25 deg.C of 0.1-2 and the ball-point pen using a water base ink having the ink follower are provided. |
