Re: Cold film and exposure

[Joel.Alpers@xxxxxxxxxxx]

#     
#     I do remember experimenting a little at the time with a nitrogen 
#     atmosphere and Kodachrome 25.  I recall the effort was to increase the 
#     effective ISO rating of the K-25 without losing the fine (no) grain 
#     images after exposure. Neat!  Cool!  But alas, I left it there and 
#     pursued no further.
#     
#     So, my recollection is that it wasn't the cold that affected the 
#     exposure index of the film but the elimination of oxygen at the 
#     emulsion surface.  Oh yes, I remember the effect lasted many hours 
#     (maybe even a day or two - that I don't remember).
#     

There is a reasonably good article on forming gas hypersensitazion
at the WEB site:

  http://www.astropix.com/hyp.htm


Joel Alpers
Rocky Mountain Memories - Equipment and Supplies for the 3D Photographer
rkymtmem@xxxxxxxx
http://www.frii.com/~rkymtmem


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