Processing C41 film as slide in b/w developer and C41

DareFail · Apr 18, 2023

Ranieri said:
In post #7 Rudeofus said to develop CD to completion.

It would be great if Rudeofus explain how this could be done.
Can you see the film for CD completion after a stop bath maybe?

Donald Qualls · Apr 19, 2023

DareFail said:
Can you see the film for CD completion after a stop bath maybe?

All the steps after stopping first developer can be done in the light. You should get very close to CD completion if you triple the C-41 time to around 10 minutes.

lamerko · May 19, 2023

Interesting topic. I'll play around these days
Instead of C41 chemistry, I will use ECN2 in combination with Vision3. For the color developer, I would double the developer (I would do the same for the C41). The first developer is important - there probably isn't a standard one that meets the need without modification. Maybe I'll start with ID-68, doubling the hydroquinone and quadrupling the phenidone. I will put some solvent - thiocyanate or hypo. They will limit development time though - I'll probably raise the pH enough to compensate. I can add 0.5-1g metol - I guess that will raise the activity, but I will have to add quite a few blockers

Ranieri · May 21, 2023

I can't wait to see the results

DareFail · Dec 28, 2023

lamerko said:
Interesting topic. I'll play around these days
Instead of C41 chemistry, I will use ECN2 in combination with Vision3. For the color developer, I would double the developer (I would do the same for the C41). The first developer is important - there probably isn't a standard one that meets the need without modification. Maybe I'll start with ID-68, doubling the hydroquinone and quadrupling the phenidone. I will put some solvent - thiocyanate or hypo. They will limit development time though - I'll probably raise the pH enough to compensate. I can add 0.5-1g metol - I guess that will raise the activity, but I will have to add quite a few blockers

Out of curiosity, did you do any of these things? Any results?

koraks · Dec 28, 2023

Eugen Mezei said:
Which are those?

Presently, Kodak Aerocolor, which is sold by a variety of sellers. It's available as e.g. SantaColor, but there are other fancy names it's being sold under.
Harman Phoenix is also maskless. But it's a kind of a specialty film with its very high contrast.

Both Aerocolor and Phoenix are technically maskless, but this doesn't mean the unexposed film (processed as negative) is clear. Phoenix is bluish in appearance, Kodak Aerocolor is pink.

Rudeofus · Dec 28, 2023

Eugen Mezei said:
Which are those? I know only about Rollei Digibase CN200 (also sold as CR200; N=negative to be developed in C41, R=reversal for E6 but in my opinion it always was the same emulsion) and now renamed/unified to Rollei Crossbird. I would like to know about other C41 films without orange mask.

@koraks already answered your question better than I could have. A small color cast is probably less obvious than it sounds, our eyes are quite good at unconsciously compensating color casts, as long as they are not as strong as the typical orange mask.

Processing C41 film as slide in b/w developer and C41

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