Editing Photographic developer (section)

==Proprietary methods==
The [[K-14 process]] for [[Kodachrome]] films involved adding all the dyes to the emulsion during development. Special equipment was needed to process Kodachrome. Since 2010, there has been no commercial entity that processes Kodachrome anywhere in the world.

In colour print development the [[Ilfochrome|Ilfochrome, or Cibachrome]], process uses a print material with the dye-stuffs present and which are bleached out in appropriate places during developing. The chemistry involved here is wholly different from C41 chemistry; (it uses azo-dyes which are much more resistant to fading in sunlight).