C-22 process

C-22 is a standardized process in the chemical photography for color development of negative films.

History

The process C-22 was designed in the 1950s by Kodak for color film Kodacolor and later used in other film manufacturers. 1972/1973 it was replaced by the more developed at Kodak Process C- 41. In contrast to the latter, the film developing at times of C -22 was far less standardized: On the one hand require different film types - even within the Kodak family - different long development times. On the other hand, C- 22 is not the only process for color negative development on the market; Agfa used, for example, at the time different versions of the Agfacolor process. Today ( 2013) the development of C-22 is offered only by very few, specialized laboratories worldwide.

Processing

The development of the film material is carried out at temperatures of about 24 ° Celsius. Thus the method is not compatible with today offered C 41 - the emulsion layer of a carbon film 22 was melt at 38 ° C used therein. The steps are:

The steps 1 to 3 to be performed in total darkness, in order to prevent a subsequent exposure of the film.