Orthochromatic stock
Description
“In 1873 Dr Vogel discovered that by adding dyes to the sensitive material, its sensitivity could be extended, so that it would record green as well as blue. The new ‘orthochromatic’ plates were available commercially from 1882. The first really efficient dyes, extending the sensitivity of the photographic emulsion to all visible colours, were not available until the early years of this century, but by the late 1890s photographic materials could be made sensitive to orange and red-orange light, making colour photography practical.”
(Coe, Brian (1978): Colour Photography. The First Hundred Years 1840-1940. London: Ash & Grant, pp. 116)
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„Film orthochromatique (film négatif Pathé Standard)“ (orthochromatic stock). Source: Didiée, L. (1926): Le Film vierge Pathé. Manuel de développement et de tirage. Paris: Pathé.
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„Film ordinaire (non orthochromatique)“ (Normal, non-orthochromatic stock). Source: Didiée, L. (1926): Le Film vierge Pathé. Manuel de développement et de tirage. Paris: Pathé.
Original Technical Papers and Primary Sources
Vogel, Hermann Wilhelm (1873) In: Photographische Mittheilungen, Dec. 1873, 10,117, pp. 233-237.
Secondary Sources
Coe, Brian (1981): The History of Movie Photography. Westfield, N.J.: Eastview Editions, on p. 116. View Quote
Hopwood, Henry Vaux (1915): Color cinematography. In: Henry Vaux Hopwood: Hopwood’s living pictures. Their history, photoproduction, and practical working. With classified lists of British patents and bibliography. London: The Hatton Press, new ed., rev. and enl. by R.B. Foster, pp. 253–273, on p. 261. View Quote
Mees, C. E. Kenneth (1937): The Development of the Art and Science of Photography in the Twentieth Century. In: Journal of the Society of Motion Picture Engineers, 28,1, pp. 3–20, on pp. 4–5 View Quote and on p. 9. View Quote
Pénichon, Sylvie (2013): Twentieth Century Colour Photographs. The complete guide to processes, identification & preservation. London, Los Angeles: Thames & Hudson, on p. 17. View Quote
Links
Blog entry on Hermann Wilhelm Vogel and his journal Photographische Mittheilungen
Contemporary Reception
Coustet, Ernest (1921): Le cinéma. Paris: Librairie Hachette, on p. 6 View Quote and on pp. 107-108. (in French) View Quote
