The process of making prints on paper direct from a drawingorprint on translucentpaperor cloth. Paper is coated with a mixture of ammonia, citrate of iron, and potassium ferrocyanide. On exposuretolight this is changed in insoluble Prussian blue; while the lines of the drawing are left in which or a more paler blue. The blue print is immersed in a bath of clearwater and becomes fixed by simply washing away all soluble matter. 2. Aprint made by the above described process. (Sturgis, 1900)
