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One can also artificially limit the range of color in a photo to those within a certain hue by using black-and-white film or paper, or by manipulating color images using computer software. Color images can be converted to black and white on the computer using several methods, including desaturating the existing color RGB image so that no color ...
The Silver Star Medal (SSM) [5] is the successor award to the "Citation Star" (3 ⁄ 16 silver star) which was established by an Act of Congress on 9 July 1918, during World War I. On 19 July 1932, the Secretary of War approved the conversion of the "Citation Star" to the SSM with the original "Citation Star" incorporated into the center of the ...
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A single overall colour underlies the image and is most apparent in the highlights and mid-tones. From the 1870s albumen printing papers were available in pale pink or blue, and from the 1890s gelatine-silver printing-out papers in pale mauve or pink were available. There were other kinds of tinted papers as well.
A black and white developer develops the silver in each image layer. Development is stopped with a rinse or a stop bath. The film is fogged in the reversal step. The fogged silver halides are developed and oxidized developing agents couple with the dye couplers in each layer.
The remaining silver and silver compounds are then bleached out, leaving a color image composed of dyes in three layers. [3] The exposure of a chromogenic print may be accomplished with a traditional photographic enlarger using color filters to adjust the color balance of the print.
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Sepia toning is a specialized treatment to give a black-and-white photographic print a warmer tone and to enhance its archival qualities. The metallic silver in the print is converted to a sulfide compound, which is much more resistant to the effects of environmental pollutants such as atmospheric sulfur compounds.