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Silver mirroring, or "silvering", is a degradation process of old black-and white-photographic prints caused by conversion of the black silver oxide to silver metal. This results in a slightly bluish, reflective patch in the darkest part of a print or negative when examined in raking light. It often indicates improper storage of the prints. [3]
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.
The majority of monochrome photographs produced today are black-and-white, either from a gelatin silver process, or as digital photography. Other hues besides grey can be used to create monochrome photography, [1] but brown and sepia tones are the result of older processes like the albumen print, and cyan tones are the product of cyanotype prints.
Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...
Thermal printing was first used in the 1930s in electrocardiograph recorders. In 1950, this technology was used by 3M in the Thermofax copy machine. [10] However, the first versions of this process were based on the destruction by temperature of a white dye layer, under which was placed a paper pre-colored in black or other contrasting color.
Duotone, the use of two ink colors in printing; Halftone, the use of black and white in a pattern that is perceived as shades of grey (may be extended also to color images) Monochromacy, a type of color vision deficiency; Monochromatic color; Monochrome monitor, used with computers; Monochrome photography, also known as black-and-white photography
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