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  The Cyanotype, Cyan refers to the print's blue color, is one of the oldest photographic processes. A contact print is made by placing a large negative on a piece of sensitized printmaking paper. The sandwiched paper and negative are placed under glass and exposed to the ultra violet rays of the sun. This exposure takes often up to an hour. The print is then developed in water then washed and dried. Fixing is not required.  
  Represented by The George Billis Gallery: