Warm tone developer is a developer producing image colors in chlorobromide papers ranging from warm black to reddish brown, according to type.
-Chlorhydroquinone - developing agent contained in warm tone developers.
-Chloride paper - printing paper with a silver chloride emulsion. Much less sensitive than bromide paper. Mainly used for contact printing.
and silver bromide emulsion A photographic paper coated with an emulsion made up of both silver chloride and silver bromide. Used for producing enlargements with a warm, slightly brownish black image, especially if processed in a warm tone developer.
 See also: Emulsion, Developer, Photograph, Tone, Bromide
  
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