In 1994, Technicolor announced the development of an enhanced dye-transfer process. This process became effective in  June 1997. There was no official denomination, so “Technicolor No. VI” is not to be confused with statements from the mid ...

“In 1905 Thomas Manly (d. 1932) of London introduced the Ozobrome process, which was a modification of his earlier Ozotype, patented in 1898. The process was based on a carbon printing method proposed in 1873 by Auguste Marion (1835–1917) and ...

“In 1939 Thomas S. Curtis of Huntington Park, California, introduced Curtis Neotone, a simple dye mordanting printing method for the production of color prints or transparencies from color separation negatives. With Curtis’s method, a ...

“In 1939 Thomas S. Curtis (1889–1964) proposed Orthotone, a dye imbibition printing method that was primarily a variation of the widely used Eastman Wash-Off Relief. Orthotone offered its practitioners complete control on the contrast or ...

Theory of trichromatic vision proposed by Thomas Young.

“The New Agfacolor Process; Agfa Ansco Corp., Binghamton, N. Y. A survey of the history of monopack or multilayer photographic color processes is given, including the coloring methods of greatest importance at the present time. These are: (a) ...

“In 1898 William Friese-Greene, a professional portrait photographer by trade, demonstrated in London ‘the first process of true natural-color cinematography.’ His program consisted of  ‘a series of animated natural-color pictures,’ and although this demonstration aroused considerable interest at the time, Friese-Greene was unable to exploit this system on a profitable basis. Undaunted, he eventually developed a total of four different color methods.”

“Inevitably, the success of Kinemacolor led to the appearance of imitations. One company, Friese Greene Patents Ltd had been formed in 1908 to exploit several patents, mostly impractical, filed by Friese Greene. From this came a new company, ...

“Also during the 1990s, William (Bill) Nordstrom started to experiment with a carbon process called Agfa-Proof, a four-color proprietary prepress color proofing system. He founded the EverColor Corporation in El Dorado Hills, California, in ...

“Apparently, associated with W. Friese-Greene, in the same year, Captain William Norman Lascelles-Davidson, also of Brighton, patented a triple lens motion picture camera (E.P. 23,863, 1898). The colour filters revolved either behind the lenses, ...

“In 1919 Kelley produced a series of coloured cartoons which were drawn by Pinto Colvig. In 1924 he introduced “Kelleycolor,” which was an imbibition process. Two colours were imbibed on a black-and-white key image. In 1926 he ...

”Kelley’s first color process was a four-color additive system introduced in 1913. Called Panchromotion, Kelley formed a company which would exploit the process commercially and, he hoped, provide strong competition for Kinemacolor. He apparently ...

“In its final form Prizma made use of duplitized positive film. As in previous Prizma systems, the original negatives were alternate frame sequential exposures. The Prizma negative was printed on both sides of the positive film in a special ...

“The color experiments were conducted in the basement of a house at 1586 E. Seventeenth St., Brooklyn, N. Y. During this time a double-coated stock and a bleach formula which had much to do with the success of the later Prizma process were ...

”The process as illustrated in USP 1431309 was a two-color additive process, but it is stated that it could be a three- or four-color process. For the original photography, the negative was exposed through a line screen composed of alternate bands ...