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[OM] Re: ? on B&W photography

Subject: [OM] Re: ? on B&W photography
From: keith_w <keith_w@xxxxxxxxxxxxxx>
Date: Thu, 22 Jun 2006 15:14:55 -0700
Winsor Crosby wrote:
> Can't point to anything. My understanding, though, is that indeed,  
> chilling film extends its life. It is, after all a chemical reaction  
> waiting to happen and those things are slowed by low temperature. I  
> am not sure what the difference is between shelf life extension and  
> maintaining the emulsion at a particular state. The end result sounds  
> the same to me.
> 
> I think it is consensus that there is little difference in the  life  
> extension effect between refrigerator temperatures and freezer  
> temperatures, although some have said that freezing the moisture in  
> the emulsion can sometimes damage it. Never observed that sort of  
> damage myself, but started using a plastic storage container in the  
> meat keeper after that. The oldest refrigerated film I have used was  
> 2 years past the expiration date and it was fine. It was medium  
> speed, color reversal film. It did not seem to help with Polaroid  
> film packs.
> 
> 
> 
> Winsor
> Long Beach, California, USA

I have some Kodak Supra 400 Professional 35mm that has an expiration date of 
May of 2002. Some 18 rolls of it!
So far as I know, it's always been in the refrigerator's crisper drawer..

I have no comfortable assurance it's still good, but will try a couple of 
rolls in the next week or so.

I don't have any figures as to how long Kodak says film such as this is safe 
inside a 'fridge.

keith whaley

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