Description

Roller tip pen which use ball point writing mechanisms with water-based
liquid or gelled , as opposed to the oil-based inks found in . These
less viscous inks, which tend to saturate more deeply and more widely
into than other types of ink, give roller tip pens their distinctive
writing qualities. The writing point is a tiny ball, usually 0.5 or
0.7 mm in diameter, that transfers the ink from the reservoir onto the
paper as the pen moves.