Photographic print toning ||This article needs additional
citations for verification. (September 2008)| In photography,
toning is a method of changing the color of black-and-white
photographs. In analog photography, toning is a chemical process
carried out on silver-based photographic prints. This darkroom
process can not be done with a color photograph and although the
black-and-white photograph is now toned, it is still considered
a black and white photograph as it is monochromatic. The effects
of these processes can be emulated with software in digital
photography. Most toners work by replacing the metallic silver
in the emulsion with a silver compound, such as silver sulfide
(Ag2S) in the case of sepia toning. The compound may be more
stable than metallic silver and may also have a different color
or tone. Different toning processes give different colors to the
final print. In some cases, the printer may choose to tone some
parts of a print more than others. Toner also can increase the
range of visible sh