| abstract |
(57) [Summary] [Configuration] Fluorescent dye 0.01 such as Basic Red 1 -30% by weight, polyethylene glycol 5-50% by weight, a viscosity modifier such as a polymer, and water, and the solid content at the time of drying is 15-60% by weight and the viscosity is 50%. To 2000 centipoise. [Effect] Even if the pen tip is faced down and stored for a long time without attaching the cap, the ink does not ooze out from the ball point pen tip. |