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The conservation and restoration of photographs is the study of the physical care and treatment of photographic materials. It covers both efforts undertaken by photograph conservators, librarians, archivists, and museum curators who manage photograph collections at a variety of cultural heritage institutions, as well as steps taken to preserve collections of personal and family photographs.
Digital photo of Kearny Generating Station, converted to black and white in Lightroom, with color channels adjusted to mimic the effect of a red filter. 1968 group portrait of a Swedish musical's cast. Black-and-white photography is considered by some to be more subtle and interpretive, and less realistic than color photography.
In photography, toning is a method of altering the color of black-and-white photographs. In analog photography, it is a chemical process carried out on metal salt-based prints, such as silver prints, iron-based prints (cyanotype or Van Dyke brown), or platinum or palladium prints. This darkroom process cannot be performed with a color photograph.
Standard black and white stock can also be reversal processed to give black and white slides. [8] After 'first development,' the initial silver image is then removed (e.g. using a potassium bichromate/sulfuric acid bleach, which requires a subsequent "clearing bath" to remove the chromate stain from the film). The unfixed film is then fogged ...
1861 – James Clerk Maxwell presents a projected additive color image of a multicolored ribbon, the first demonstration of color photography by the three-color method he suggested in 1855. It uses three separate black-and-white photographs taken and projected through red, green and blue color filters. The projected image is temporary but the ...
People use raster graphics editors to repair digital images, or to add or replace torn or missing pieces of the physical photograph. Unwanted color casts are removed and the image's contrast or sharpening may be altered to restore the contrast range or detail believed to have been in the original physical image.
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