Simultaneous "straight" processing C-41 and cross-processing E-6

[TheFlyingCamera]

Is there any deleterious effect on the C-41 film being processed at the same time as the E-6 film in C-41 chemistry? Will my C-41 film be harmed/color-shifted/etc or will it be fine? I'm not worried about how the E-6 comes out as it is also out-of-date.

 

[Sirius Glass]

Why not process the C-41 in one batch and the E-6 in the next batch? All you have to loose is some time but avoid a problem with cross over.

 

[Don_ih]

I developed both at once and thought maybe there was some impact on the colour negative film - but the rolls were old and possibly poorly stored, so who knows. I was surprised to see a heavy green tint on the negatives, though.

 

[Mick Fagan]

Whilst my memory is slightly iffy, when I was working in a professional lab doing Dip 'N' Dunk C41 and E6 processors, among other processes. Whenever we had E6 go through the C41 bath, we immediately ran a control strip through the C41 after the E6 film was out of the first bath.

After checking the control strip, some manual adjustments would be made, then we would invariably run one or two unimportant 8x10" sheets of C41 through the C41 bath, then another control strip. After this we would invariably do some manual adjustments to the first bath then run another control strip through.

Now we were running a very tight ship and the C41 process would quickly settle down, but it did upset the developing bath somewhat, and as a good proportion of our C41 process was taken up with processing Kodak Color Print film, which gives one a transparency, our process had to be spot on.

 

[TheFlyingCamera]

Whilst my memory is slightly iffy, when I was working in a professional lab doing Dip 'N' Dunk C41 and E6 processors, among other processes. Whenever we had E6 go through the C41 bath, we immediately ran a control strip through the C41 after the E6 film was out of the first bath.

After checking the control strip, some manual adjustments would be made, then we would invariably run one or two unimportant 8x10" sheets of C41 through the C41 bath, then another control strip. After this we would invariably do some manual adjustments to the first bath then run another control strip through.

Now we were running a very tight ship and the C41 process would quickly settle down, but it did upset the developing bath somewhat, and as a good proportion of our C41 process was taken up with processing Kodak Color Print film, which gives one a transparency, our process had to be spot on.

I'm only going to run this one-shot. Fresh chems, single use.

 

[Mick Fagan]

In that case, I have no idea, perhaps Don's experience is the one to listen too then. Keep us posted, I'll be quite interested in what happens.

 

[Don_ih]

Keep us posted

@TheFlyingCamera Definitely keep up posted. Like I said, I only did it with questionable colour neg film.

 

[TheFlyingCamera]

Scans of the film are forthcoming. Looks like my C-41 which was all fresh film came out just fine. I got weird funky results on the E6, but I'm not surprised given that it was 10+years out of date Velvia 50 and Velvia 100.

 

[TheFlyingCamera]

Example cross-processed Velvia 50

and regular C41 in the same batch: