but because if he used only one pen the whole time, the nib would start bleeding from the constant friction. That's how much intensity creating these portraits requires. Intensity, and a lot of skill.

Although the market for hand-drawn portraits largely collapsed following ... and driven by two stepper motors. An ordinary ballpoint pen is held in a spring-loaded carrier, which provides just ...

On June 10, 1943, the patent for the ballpoint pen was filed. To celebrate National Ballpoint Pen Day (#BallpointPenDay), we've pulled together writing implements from across our collection. National ...