A new elastic silver ink could let users jot down electrical circuits and wiring on walls and paper with a regular ballpoint pen (ACS Nano, 2015, DOI: 10.1021/acsnano.5b05082).

Scribble Ink lets users draw with colors that they find around them By Ben Coxworth May 27, 2014 The Scribble pen produces ink based on color samples of real-world objects View 2 Images ...