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bichromate

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bichromate
bichromate Chem. (baɪˈkrəʊmət) [see bi- prefix2 III.] a. A salt containing two equivalents of chromic acid, e.g. the bichromate of potash, used in photography and other arts; whence biˈchromated, biˈchromatized ppl. a.1854 Scoffern in Orr's Circ. Sc. Chem. 447 Heating bichromate of potash to whitene... Oxford English Dictionary
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Gum bichromate
Gum bichromate is a 19th-century photographic printing process based on the light sensitivity of dichromates. References External links Movie Video/ Viméo Gum Photo technical information (Wayback Machine archive) An introduction to the gum bichromate process wikipedia.org
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bichrome
▪ I. bichrome, n.1 Chem. (ˈbaɪkrəʊm) [Shortened form of bichromate.] Bichromate of potassium or sodium. Also attrib. (see quot. 1904).1896 G. Duerr Bleaching iv. 56 The following colours..require to be passed through a solution of bichrome in order to develop or raise the colours. 1904 Westm. Gaz. 3... Oxford English Dictionary
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Acridine
Addition of potassium dichromate to this solution precipitates acridine bichromate. The bichromate is decomposed using ammonia. wikipedia.org
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metachrome
metachrome, n. and a. (ˈmɛtəkrəʊm) [f. meta- + Gr. χρῶµα colour.] A. n. A body that changes colour.1876 Chem. News 11 Feb. 60/2 The author..passed on to the classification of metachromes, which he [Ackroyd] arranges in two groups. B. adj. Dye Chem. Designating mordant dyes and their mordants that ma... Oxford English Dictionary
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Carl Erengisle Hyltén-Cavallius
processes of tanning in so far as no bark or other substances containing tannic acid is required; the tanning being effected by »Chemical salts» such as bichromate In the latter instance, the pre-tannage is followed up by a bichromate bath. wikipedia.org
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Heinrich Kühn
Kühn mainly used the gum bichromate technique, applied in several layers, and thus allowing for previously unseen color tonalities. In 1911, Kühn invented the Gummigravüre technique, a combination of photogravure and Gum bichromate. wikipedia.org
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Mark Eshbaugh
He has specialized in alternative photography processes such as platinum/palladium and chrysotype printing, and gum bichromate, cyanotype and Mordançage bi-annual exhibition features fine art photographers from around the world working in alternative photographic processes (such as platinum Printing, gum bichromate wikipedia.org
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Robert Demachy
In 1894 he began to use the gum bichromate printing process recently introduced by A. Rouillé-Ladevèze at the Paris Salon. About 1906 he abandoned gum-bichromate printing altogether in favor of oil printing. wikipedia.org
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Ōri Umesaka
He often worked in gum bichromate, such as in Smoking City and Bamboo Forest. wikipedia.org
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Laurent Benaïm
He discovered gum bichromate printing through his search for premises to work in. Working from a book published in 1850, he developed his first gum bichromate picture in a soup plate at his home. wikipedia.org
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Alphonse Louis Poitevin
In the 1850s he discovered that gelatin in combination with either potassium or ammonium bichromate hardens in proportion to the amount of light that falls wikipedia.org
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T. O'Conor Sloane Jr.
Sloane was most active as a naturalistic photographer at the turn of the twentieth century, garnering acclaim for his gum bichromate work. Sloane experimented with gum bichromate, platinum, pigment, gaslight and gelatin silver prints and various lenses. wikipedia.org
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Chromic acid cell
The old name for potassium dichromate is potassium bichromate and the cell is often called a Bichromate cell. wikipedia.org
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Photozincography
Basis The foundation of this method is the insolubility of bichromate of potash upon exposure to light, allowing the printing of images onto zinc from This bichromate positive was then placed on a sheet of zinc covered in lithographic ink, and put through a printing press three or four times. wikipedia.org
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