A facsimile apparatus comprises first and second lamps and a controller. The controller selectively sends a first control signal to the first lamp and a second control signal to the second lamp in accordance with whether or not a data sheet contains a pattern described in a drop-out color. The first...http://www.google.com.au/patents/US4872062?utm_source=gb-gplus-sharePatent US4872062 - Method for efficiently dropping out a pattern having a drop-out color and a facsimile apparatus for realizing the same
