>>2923549>I thought that E-6's first developer was basically a standardized MQ soupI don't know what you mean by MQ, but it's a phenidone-hydroquinone developer.
>the colour dev was basically the same as for C-41Not exactly, the main part for E-6 colour dev is CD-3, while for C-41 it's CD-4.
Thing is, both the first and the colour dev are very PH sensitive and temperature sensitive.
Usually PH is to blame for green-magenta shift, if I remember correctly the colour dev has to be 11.1, half a degree less and you get magenta cast, half a degree more and you get green/yellow cast.
But it's also temperature critical, both the first and the second dev.
The rate which the solution penetrates the 3 layers of a colour slide, the rate that the colour dev oxidises and couples to create the colour dyes, these are affected primarily by ph and temperature.
It's a very hard thing to synchronise the development of 3 layers, and their dye-coupling.
And when a process is painstakingly devised to do just that, you can't use a different temperature and just modify the times. Cause the different layers respond differently to a time change, not uniformly.
You can get passable results, but I've never seen a room temp kit that had no crossover when tested rigorously with reference strips.
C-41 is similar, but more tolerant in the sense you can "control" white balance by filtration when printing.
