I have a book somewhere that gives the chemistry for reverse processing (turning a negative into a positive) .... now, which book could that be? Anyone tried this at home recently? I think it involved dichromate, which I have.
I have a book somewhere that gives the chemistry for reverse processing (turning a negative into a positive) .... now, which book could that be? Anyone tried this at home recently? I think it involved dichromate, which I have.
There are some informations about the reversal process on Ilford's web site
http://www.ilfordphoto.com/applicati...nload.asp?n=11
Another very recent document
http://home.snafu.de/jens.osbahr/pho...r_reversal.pdf
Plus many discussions like this one
http://www.apug.org/forums/archive/i...p/t-46994.html
Reverse processing. I thought you meant fixer first, then stop, and finally developer. I accidentally did that once. I don't recommend it...
Kirk - www.keyesphoto.com
...unless you want really slow film for really long exposures. (post-fixation physical development)
Off topic, but the Dr5 site has examples of various reverse processed films, using their process.
http://www.dr5.com/Filmreview.html
Yes dichromate is used to bleach the latent image, re expose to light and redevelop. You can find a couple of very good articles in unblinkingeye.com.
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