FREE INK TYPE BALLPOINT PEN REFILL

摘要

PURPOSE: A free ink type ballpoint pen refill is provided to evenly mix an ink composite using a mixing member when an coloring agent including metallic or the titanium oxide with a heavy specific gravity is precipitated. CONSTITUTION: A free ink type ballpoint pen refill comprises: an ink storage pipe; a writing tip(16) which is combined on tip-end part of the ink storage pipe and in which a ball is rotatably assembled; an ink composite(20) saved inside the ink storage pipe; and an ink follower(22) which blocks a rear part of the ink storage pipe and moves to the writing tip side as storage quantity of the ink composite diminishes. A viscosity of the ink composite is 5~1000mPa.s(B type Viscometer, and 20°C) and a stirring member(30) is installed inside of the ink composite.