Messages through the surface of concrete
Chris Glaister, Afshin Mehin, and Tomas Rosen of the Royal College of Art Innovation Unit have developed embedded devices which allow graphics, words and numbers to be displayed through concrete. First, thermochromic ink is mixed with concrete. Second, nickel chromium wires, which heat up when electric current is passed through them, are set beneath the concrete surface. The area above the wire changes colour when a certain temperature is reached. The arrangement of these wires beneath the concrete allows the display of graphics and information.
Source: chromastone.comAdded: 7 June 2006