BALL-POINT PEN

摘要

A direct-liquid low-viscosity aqueous ball-point pen, wherein ink (17) is a low-viscosity aqueous ink containing more than 40 % of water as a main solvent and having a viscosity at normal temperature of 1.5-60 cps, a collector (6) having elongated slit-like ink groove (16) and air vent groove (14), a tip member (5) having the narrow and long air groove (14) provided in a portion for communication of a collector vent section (15) with the outside air, the maximum amount of ink stored in the collector (6) is more than 15 % of the capacity of an ink tank (9), a tank body of the ink tank (a) is molded with a transparent or translucent synthetic resin in such a way that the tank body can be removed and the remaining amount of ink (17) can be visually recognized.