A sheet of paper, plastic or the like on which an image has been formed using a toner that is photochemically decolorizable by absorption of near infrared rays is illuminated with near infrared rays under the state wherein the image is heated to a temperature equal to or higher than the glass-transition...http://www.google.com.au/patents/US5405726?utm_source=gb-gplus-sharePatent US5405726 - Method and apparatus for decolorization, and image forming apparatus
