Dry Plate Photographic Process
The Gelatin or Dry Plate photographic process was invented in 1871 by Dr. Richard L Maddox. This involved the coating of glass photographic plates with a light sensitive gelatin emulsion and allowing them to dry prior to use. This made for a much more practical process than the wet plate process as the plate could be transported, exposed and then processed at a later date rather than having to coat, expose and process the plate in one sitting. The gelatin dry plate process technique was developed and eventually led to the roll film process.