Paint me a circuit: A painted-on wire becomes conductive once it dries

On the music circuit: With a Midi (musical instrument digital interface) device connected, Bare Conductive's electric paint lets users create pianos on flat surfaces.

A ‘paintable wire’ boasts a wide range of applications beyond even its inventors’ dreams.

It is unsurprising that in the meeting room of Bare Conductive’s east London office, there is a light switch on the left-hand side of the door. What is surprising is that the switch is painted onto the wall.