[pure-silver] Re: B&W Positive from B&W Negative.

Richard,
Apparently this guy has negatives that he wants to make positive images of for projection.
I know he could scan the negs and create digital images, but he really wants to stick with a silver process. Essentially he is trying to take a Negative produced at some time in the past and from that negative create a postitive image that he can project.
At the moment he is thinking of attempting to use a slide duplicator to copy the negative on to negative film and figuring that a negative of a negative should produce a positive image... 

I will look into the fine grain Release Positive film you mention.

Thanks!
Speedy

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I am not quite sure I understand what you want. If you want to make projectable transparencies from existing negattives you can print them onto Kodak Fine Grain Release Positive film, which is still available. This is film with an emulsion similar to fast enlarging paper. Its processed in an ordinary print developer. You can also make transparencies directly in the camera by reversal processing negative film. At one time Kodak had a kit for reversing T-Max but I don't know if its still available. The reversal processs is well known but you have to experiment with the first developer. Another problem is that most 35mm B&W negative films have a pigment in the support which is not removable. This cuts down the brightness of the transparencies. I have some formulas for reversal processing and there are others on the web. The process is not difficult but the first developing step is somewhat critical. I will post more details if you want them. Agfa Scala was a B&W reversal film but its off the market now. 

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx

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