Wednesday, March 5, 2008
Color Changing Cars
The system works like this: the vehicle's standard galvanized sheet steel body panels are painted with a special polymer coating embedded with superparamagnetic iron oxide particles.
When a low-grade magnetic field is applied to the coating, the tiny iron oxide crystals adjust their spacing and by doing so, change the way light is reflected to the viewer's eye. Dialing in varying levels of magnetic field strength essentially causes the color of the paint to change in a controlled manner. Since the magnetic field must be maintained constantly in order for the color-changing effect to work, it's ideal for automotive applications. Turn off the car and the paint color reverts back to its natural