why don't astronauts use a fountain pen or a ball point pen with a liquid ink in spacecraft - Science - Friction

Question

​why don't astronauts use a fountain pen or a ball point pen
with a liquid ink in spacecraft?

Kronice · Accepted Answer

Several instruments have been used to write in outer
space, including different types of pencils and pens Some of them
have been unmodified versions of conventional writing instruments;
others have been invented specifically to counter the problems with
writing in space conditions
A common urban legend states that, faced with the fact
that ball-point pens would not write in zero-gravity, NASA spent a
large amount of money to develop a pen that would write in the
conditions experienced during spaceflight (the result purportedly
being the Fisher Space Pen), while the Soviet Union took the
simpler and cheaper route of just using pencils The Fisher Space
Pen was actually developed independently in a private organization
in the 1960s, and it was remodernized (by Alessandro Vanoni) in
2014

Notes on a map written with a felt-tip pen by Michael
Collins while in orbit around the Moon

​why don't astronauts use a fountain pen or a ball point pen with a liquid ink in spacecraft?

why don't astronauts use a fountain pen or a ball point pen with a liquid ink in spacecraft?