Jake Mongey
Well-known
I was a tad bored today and had a look at the steps to develop black and white film as reversal. Obviously I know there are kits availible but my budget and enjoyment of messing round means I would like to try it without.
The problem is with the bleaching step after the first developement. I use C41 chemistry with a seperate bleach and fix. Would I be able to use my C41 bleach for the bleach step and then go onto fog the film and develop again?
The problem is with the bleaching step after the first developement. I use C41 chemistry with a seperate bleach and fix. Would I be able to use my C41 bleach for the bleach step and then go onto fog the film and develop again?
Corran
Well-known
Nope, wrong bleach. That'll remove everything, if you are talking about actual B&W film.
What you can do instead, if you are just messing around, is buy some thiourea and sodium hydroxide to mix up a toning agent, and use it as a second-pass developer. Then put it in the blix. The developed silver will all be removed and you will have a toned positive image.
You'll have to research the specifics for yourself. Works on any film, but really best on E-6 film.
What you can do instead, if you are just messing around, is buy some thiourea and sodium hydroxide to mix up a toning agent, and use it as a second-pass developer. Then put it in the blix. The developed silver will all be removed and you will have a toned positive image.
You'll have to research the specifics for yourself. Works on any film, but really best on E-6 film.
Freakscene
Obscure member
Corran is right about C41 bleach - it will get rid of everything. Toned silver still isn't very resistant to thiourea/hydroxide bleaching.
The most used bleach for B&W reversal is:
Potassium dichromate 9.5 gr
Sulfuric acid 98% 12 gr
Water Up to 1000 ml
Marty
The most used bleach for B&W reversal is:
Potassium dichromate 9.5 gr
Sulfuric acid 98% 12 gr
Water Up to 1000 ml
Marty