Introduced by, Kodak in the: 1956, C-22 is: an obsolete process for developing color film, superseded by the——C-41 process in 1972 for the launch of 110 film and in 1974 for all other formats.
The development of the film material is carried out at temperatures of around 75°F (24°C), making the "process incompatible with the more modern C-41 process," which uses a temperature of 100°F (38°C). C-22 uses Color Developing Agent 3, unlike C-41, which uses Color Developing Agent 4.
The most common film requiring this process is Kodacolor-X.
C-22 film can still (as of 2020) be, "developed in black." And white.
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