Junyi Zhao in the McKelvey School of Engineering demonstrates using a simple ballpoint pen to write custom LEDs on paper (left). The same pens can be used to draw multicolored designs on aluminum foil ...

Ballpoint pens need to be convinced to write, need to be pushed into the paper rather than merely touch it. The No.2 pencils I used for math notes weren’t much of a break either, requiring ...

The pen was the first to go on sale in the US, but it was by no means the first ballpoint pen – the head of the US company that made it had in fact discovered a version during a business trip in ...

The 100 best pens as tested by the writers and editors of the Strategist. They tested felt-tip, gel, rollerball, ballpoint, and fountain pens, including ones from Pilot, Baron Fig, Montblanc, Ohto ...

Junyi Zhao in the McKelvey School of Engineering demonstrates using a simple ballpoint pen to write custom LEDs on paper (left). The same pens can be used to draw multicolored designs on aluminum foil ...

Researchers have developed ink pens that allow individuals to handwrite flexible, stretchable optoelectronic devices on everyday materials including paper, textiles, rubber, plastics and 3D objects.