Bi-pack
Description
A. Gurtner (Eng. P. 7924/03; U.S.P. 730454), used a front element that was sensitive only to the blue, and a rear element that was sensitive up to but not including the red. He was the first person to suggest that the two films or plates be placed emulsion to emulsion, and have their edges pasted together to form a single pack.
(Friedman, Joseph Solomon (1945): History of Color Photography. Boston: The American Photographic Publishing Company, p. 93.)
Secondary Sources
Coote, Jack H. (1993): The Illustrated History of Colour Photography. Surbiton, Surrey: Fountain Press, on p. 128. View Quote
Friedman, Joseph Solomon (1945): History of Color Photography. Boston: The American Photographic Publishing Company, p. 93.
Downloads
Patents
D.R.P. 146,149 (Gurtner, Adolf Alfred; filed Jan. 16, 1902; granted Oct. 26, 1903)
Download PDFE.P. 7,924 (Gurtner, Adolf Alfred; filed Apr. 6, 1903; granted Feb. 18, 1904)
Download PDFE.P. 28,920 (Bennetto, John Wallace; filed Dec. 7, 1897; granted Nov. 5; 1898)
Download PDFU.S.P. 730,454 (Gurtner, Adolf Alfred; filed Aug. 11, 1902; granted June 9, 1903)
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