In a message dated 7/4/04 9:54:49 PM, georgea@cam.org writes:
Part of the hypering process involves vacuum baking to remove moisture
and impurities from the film.
For films that react well to hypering, would just vacuum bake portion of
the process provide any improvement to the film? Or would I just be
looking for trouble with film creep due to moisture ingress since I
don't have a nitrogen or dry air purge system on my camera body?
George Anderson
Montreal Canada
George:
Early experiments at Kodak (1970's) revealed that all the 'parts' of the hypering process
contribute to the final result, but none individually are as good as the whole.
The process consists of 3 parts:
1. Dessication by placing the film in a vacuum. This removes moisture and oxygen, etc. from the film.
2. Introduction of Forming gas (92% Nitrogen 8% Hydrogen) or pure Hydrogen.
3. Baking the film at an elevated (50 deg. C) in the gas for a period of time.
Kent Kirkley
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