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Universalium. 2010.
gum bichromate process — a contact printing method in which the image is formed on a coating of sensitized gum containing a suitable colored pigment and potassium or ammonium dichromate. Also called gum dichromate process. [1895 1900] … Useful english dictionary
Gum bichromate — is a 19th century photographic printing process based on the light sensitivity of dichromates. It is capable of rendering painterly images from photographic negatives. Gum printing is traditionally a multi layered printing process, but… … Wikipedia
bichromate process — any of several methods of photography in which the light sensitive medium is alkaline bichromate associated with a colloid such as gum, albumen, or gelatin. * * * … Universalium
bichromate process — any of several methods of photography in which the light sensitive medium is alkaline bichromate associated with a colloid such as gum, albumen, or gelatin … Useful english dictionary
Gum printing — is a way of making photographic reproductions without the use of silver halides. The process used salts of dichromate in common with a number of other related processes such as sun printing.When mixtures of mucilaginous, protein containing… … Wikipedia
gum print — Photog. a print made by the gum bichromate process. * * * … Universalium
gum print — Photog. a print made by the gum bichromate process … Useful english dictionary
Gum arabic — Gum arabic, a natural gum also called gum acacia, and chaar gund or char goond (in India), is the hardened sap taken from two species of the acacia tree, Acacia senegal and Acacia seyal . It is used primarily in the food industry as a stabilizer … Wikipedia
Alternative process — The term alternative process refers to any non silver based photographic printing process. Currently the standard photographic printing process is the gelatin silver process. Alternative processes are often called historical, or non silver… … Wikipedia
Robert Demachy — Robert Demachy (1859 1936) was a prominent French Pictorial photographer of the late 19th and early 20th century. He is best known for his intensely manipulated prints that display a distinct painterly quality.Early Years (1859 1875)Léon Robert… … Wikipedia
