Source: xkcd: Up Goer Five.
You can indeed use this ballpen ink as conductive material to make circuitry almost anywhere. This custom made conductive ink is more like a contrasty proper ink than other silver inks available in the market.
- HOW TO: Make silver ink that conducts electricity (boingboing.net)
- Apen Writes On Paper, Smartphones, Tablets (wired.com)
Welcome to Macintosh Documentary to Premiere at Wisconsin Film Festival | MacMegasiteThere’s gonna be new documentary on how Apple had impact on our daily life. Apple changed our life forever, so rapidly that we never had time to recall it. Now it’s the time!