How to Cross Process C-41 color films and E-6 transparency films

First off, what is cross processing? Each type of film, whether it be color, black and white, or transparency has it’s own set of chemicals (which we call chemistry) for developing. Cross processing refers to the developing of E-6 transparency film in C-41 chemistry and vice versa.

Cross processing can produce various effects, including crazy colors and lots of saturation. It’s important to note that each brand of film will have it’s own cross processing results; for example cross processing slide film to C-41 does not have universal results. FujiChrome Velvia and Provia will have totally different results even though they are both made by Fuji.

A Guide for Cross Processing:

  • E-6 to C-41: you can either exposure normally, or underexpose by 1 stop and use normal developing times
  • C-41 to E-6: overexpose by 1 to 2 stops and push film (in processing) 1 to 1 ½ stops

These are just recommendations and films vary quite a bit, so it’s a good idea to test out your favorites brands and see what works for you. Here are some examples of photographs I have posted that have been cross processed:

{Image: Rue Prevot, Paris (2006) | Shot With a Nikon FM2 and cross processed Fuji Provia}