Paper Negative Reversal Process

[Photo Engineer]

Sodium Hypo = Sodium Thiosulfate

Chemicals can be purchased from many companies. I use the Photographers Formulary in Montana, and APUG sponsor.

Use Battery Acid. It is 37% Sulfuric Acid and can be purchased at any auto store. Use gloves, goggles and an apron when handling the stuff and when handling and using the bleach.

You can do the final development in total room light, but I would use 1 minute room light exposure to each side if you go back into the darkroom.

AAron, are you sure you want to mess with the chemicals? You can buy a kit for this!

PE

[aaronmichael]

Sodium Hypo = Sodium Thiosulfate

Chemicals can be purchased from many companies. I use the Photographers Formulary in Montana, and APUG sponsor.

Use Battery Acid. It is 37% Sulfuric Acid and can be purchased at any auto store. Use gloves, goggles and an apron when handling the stuff and when handling and using the bleach.

You can do the final development in total room light, but I would use 1 minute room light exposure to each side if you go back into the darkroom.

AAron, are you sure you want to mess with the chemicals? You can buy a kit for this!

PE

Hahah - I just talked to the people working at our lab and they gave me a big warning about working with these chemicals and other chemicals. I think I'm just going to have to stick to contact printing for now Either that or buy some direct positive paper or a reversal kit.

[jesterthejedi]

http://www.adorama.com/VBSPF.html

There is also a cheaper one but this seems like good paper.

[holmburgers]

If you are careful and recognize how to work with the chemicals, there's no reason that you should be afraid to handle them (or let others suggest it's frightful).

The potassium dichromate is the only chemical that probably isn't in a normally stocked darkroom. I've heard that some kind of Kodak Tray Cleaner will work, as it's basically an ideal bleach of sulfuric acid & potassium dichromate.

Hypo clearing agent is sodium sulfite + a pinch of sodium bisulfite; I don't see why that wouldn't work for the clearing bath.