Pen tip size affects the thickness of the line the pen leaves on the paper. Pen tip size can be extra fine, ... PILOT The Better Ball Point Pen Refillable & Retractable Ballpoint Pens.

"But ballpoint pen ink is a different kind of fluid." Longtime CBC host Suzuki, a geneticist, has been hosting CBC science programming since 1971, starting with Suzuki on Science on TV and moving ...