how to fog film

[steveb533]

Hi,
I was reading about developing c41 in b.w developer first, stopping, then fogging it and developing in normal c41. How do you fog it? Is that a chemical process or do you just expose it to light?

Thanks,
Steve

 

[Photo Engineer]

Reread the information. What you have posted is incorrect. Sorry.

PE

 

[steveb533]

Ok, thanks. Yes, that thread was on processing e6. I thought there was a similar method for c41; I accidentally developed a roll in b/w developer and have been looking for the best way to save it.

 

[Bob-D659]

Exactly what have you done, dev only, stop, fix? ? ? ? ? ? ? ? ? ? ? ? ? ?

 

[steveb533]

I developed and stopped with water . I havent fixed it yet.

 

[Photo Engineer]

Ok, here is how to proceed.

Fix and wash. You now have a B&W record of the color image.

Now, bleach in a rehal bleach with Ferricyanide and Bromide.

Wash well and treat with a sodium sulifte clearing bath. Wash again.

Now, run it through the C41 process in the light after fogging the film totally. You will have a reasonably good color image depending on how well the B&W process was conducted.

OTOH, just fix and scan what you now have and you will have B&W images.

PE

 

[Bob-D659]

(there was a url link here which no longer exists)

This thread might give you an idea or two on saving it. Not sure if bleaching it with a halogenating bleach can undo the development and allow the colour couplers to work.

 

[Photo Engineer]

Guys;

I assure you that rehal bleaching and then processing in C41 will give "normal" images, at least to the extent that the B&W process developed the layers. If the layers were under or over developed by the B&W process, then the color will not be true.

The couplers will not be harmed by the rehal process, but the overall image quality such as grain and detail will suffer.

PE

 

[Athiril]

Guys;

I assure you that rehal bleaching and then processing in C41 will give "normal" images, at least to the extent that the B&W process developed the layers. If the layers were under or over developed by the B&W process, then the color will not be true.

The couplers will not be harmed by the rehal process, but the overall image quality such as grain and detail will suffer.

PE

+1

You can get "perfectly fine" (scannable to good quality, dunno about printing and colour correction - or contrast for that matter) colour images.

Here is one example of the process (haven't pulled this one out in a while..)

Little Cousin by athiril, on Flickr

 

[steveb533]

Thanks alot guys for all of the help! I just had one last question: should I use a b/w type fixer or c41? I saw this thread about fixer used for both (there was a url link here which no longer exists). I assume I would use b/w and just throw out afterward. Thanks again.

 

[Photo Engineer]

As I have noted before, the acidic hardening B&W fixers should never be used with color. Use non-hardening, neutral pH fixers for color. They should not be re-used for B&W.

PE

 

[steveb533]

thanks. would tf-4 work for something like this? But at 25-35 degrees celsius I would assume. I believe it close to neutral.

 

[Photo Engineer]

TF-4 is alkaline and thus should not be used in color processing. TF-5 is nearly neutral and can be used.

PE

 

[steveb533]

Great, thanks! This has been very helpful.