Is It Easy Being Green?

Printing With Light

To create erasable paper, Xerox scientists developed compounds that change color when they absorb a certain wavelength of light but then will gradually disappear. In its present version, the paper requires a special printer that creates the image using a light bar that provides a specific wavelength of light as a writing source. The written image self-erases in 16-24 hours or can be immediately erased by exposing it to heat. Once the image is gone the paper can be reused multiple times.