Originally Posted by D W
Temperature control is the key to C41 and E6 which are run at 100F. Any C41 or E6 film are developed in the same process; C41 negatives and E6 transparencies.
I expect the this poster meant to say "same processor" as in the same Jobo. If not, this is incorrect, C41 developing and E6 are entirely different. One has 3 steps, the other, 7. I can easily imagine where a misunderstanding could happen because of the interest in "cross-processing", which mixes film and processing types up, for interesting but wildly inaccurate color with rather unpredictable results.
Temperature control and tight timing of the chemistry and wash steps are key for consistent results for accurate color. I've done a lot of E6 and C41 over the years in my Jobo CPP2. Especially with E6, this bigger Jobo with the digital temp control to 1/4 degree F is quite useful and nice for the bigger tray and more slots for chemistry bottles. There's a wash step that's temp critical right after the first developer that frequently consumes a half gallon or more of tempered water. If you don't have a Jobo or other chemistry-tempering process, I really wouldn't recommend E6. The Lift accessory is very worthwhile for the Jobo, almost necessary with E6.
C41, however, could be done in inversion tanks pretty easily. Color print films have the advantage of the additional color correction step potential in printing. Both can be corrected during or after scanning, but that's a lot more work when there are color crossovers in the shadows from poor development.