With regular felt pens, users are limited to the colors of the pens in a set. As you might have guessed, though, the Colorpik Pen is different – it can reproduce 16 million colors, which are scanned ...

It may not be quite up there with manned deep-space travel or flying cars, but the quest for a pen that can write in virtually any color is one that has been with us for a while. A group of Polish ...

3D printing pens may be toys to some, but they can be genuinely useful tools to repair 3D prints, rescue a support structure, or weld together different pieces. However, [BManx2000] found that the way ...