To permit multi-color recording on metalized recording paper, in which an electrode burns off a metal layer covering a colored pattern, and to provide for ready association of the electrode with a specific discrete removal position and particular colors appearing thereat, the colors are applied in the...http://www.google.com.au/patents/US4482901?utm_source=gb-gplus-sharePatent US4482901 - Method and system for thermally recording information on a metalized recording carrier
