At the very tip of a ballpoint pen is, you guessed it, a ball that rolls around and basically stains the paper with ink. Imagine if you dipped your body in paint and then rolled around white carpet, that's basically how writing instruments works. Here's an incredibly up close angle of a ballpoint pen writing from NRK showing you just how it works. It looks pretty damn awesome.
Incredible Close Up Video Shows How A Ballpoint Pen Works
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