Comment by falkenb0t

Not exactly a primary source but according to this thread: https://forum.nasaspaceflight.com/index.php?topic=10617.0

"Toner is held to the paper in a laser printer by electrostatic attraction (opposite charges attract), not gravity. Along those same lines, in an inkjet printer ink droplets are fired at the paper, not just dropped, so once again I doubt gravity is an issue."