Method and apparatus for forming halftone images which enables image recording on a process film without reducing the size of the recording area beyond that which is necessary. The method and apparatus is preferred particularly in the preparation of a master printing plate such as a printing plate which...http://www.google.de/patents/US5864406?utm_source=gb-gplus-sharePatent US5864406 - Method and apparatus for forming halftone images on organic-silver-salt-based printing plates
