Perhaps the film (gelatin) has a moisture range?

["Thomas H. Hogan" <flzhgn@xxxxxxxxxxxxx>]

Perhaps the gelatin which is a protein (denatured collagen) has a range
of water absorbtivity that keeps you from getting into problems when you
freeze your film. Proteins have an amazing capacity to protect against
damage by freezing.  I used to freeze very delicate brain neurons
routinely
and I had very high survival rates when I protected the cells with serum
proteins.   As long as the film is kept in a film can which is not
much larger than a film cassette much of the air/moisture is displaced
by the
film itself.  I would guess that as the temperature and humidity changes
water vapor is absorbed and released from the gelatin in the film.

BTW, a typical kitchen freezer is minus twenty degrees Centigrade.

Has anyone ever tried plunging a roll of film into liquid nitrogen? 
  

I've heard of exposed ektachrome going through a clothes washer and 
dryer without a protective plastic film can and coming out fine on 
development (c 1979)

Hank Hogan <flzhgn@xxxxxxxxxxxxx>
           http://www.pic.net/~flzhgn/irhum.html

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Topic No. 3