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Re: [APML] Storage and Transport of hypered film
> I have a couple of general questions about storage and transport of
hypered films that I hope some of you experts can help with.
>
> Having hypered at 50 deg C for a number of hours, if the film is allowed
to cool and then stored in a sealed chamber, will the hypered benefits be
preserved longer by
> back filling the chamber with room temp hypering gas or dry nitrogen? It
seems likely that the room temp condition would not continue the hypering
process
The hypering process does not stop at room temperatrure, it just slows down
a lot. Lumicon recomends storing hypered film in the hypering chamber with
forming gas at a slight negative pressure. Personally, I prefer nitrogen if
it is available. I would rather not have my Tech Pan film slowly overhyper
itself in forming gas if it is cloudy this new moon and I have to wait
another month.
>
> I am considering making some little tubes to store 2-35 mm rolls of film
in the freezer, which could be dropped into the ice chest for transport to
a dark site. As long
> as I'm making something, it wouldn't be a big deal to make them with a
valve so they could be purged.
>
> Dessicant is a lot less hassle unless there is a real extention of the
film life associated with provision of a purge.
> Any special care post exposure would also be interesting to know about.
With hypered film, dry is more important than cool, but if possible, keep it
cool also. Chemical reactions that fog the film are more pronounced with
higher temperatures. Moisture is the real enemy of hypered film. The same
after the exposure. Keep it dry above all, cool (not frozen) if possible,
and process as soon as posible.
Robert Reeves reeves10@swbell.net
520 Rittiman Rd. www.robertreeves.com
San Antonio, Texas 78209 210-828-9036
USA 29.484 98.440 200 meters
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