Oxalic acid
Soluble white crystals used in some toners.
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Oxalic acid are soluble white crystals used in some toners.
Oxidation product is the chemical produced by a color developer during the conversion of exposed silver halides to black metallic silver.
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The process involves combining iron salts with silver nitrate and either oxalic acid for a warm-brown colour or tartaric acid for brown-black result.
 See also: Acid, Light, Exposure, Print, Silver
  
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