Question

In a fountain pen ink does not run out by its own. Why?

Answer 1

Fountain Pens has a reservoir in it to store ink. The nib of the pen takes ink through the reservoir via gravity and Capillary action. Capillary action under which the liquid flows against the gravity and rise to the thin walls of the capillary. This involves the adhesion and cohesion forces. Due to this the ink in a fountain pen does not run about.