Digital BW, The Print

http://www.kodak.com/US/en/motion/support/technical/vinegar.jhtml?id=0.1.4.11.12.4&lc=en
Vinegar Syndrome

Kodak do suggest it can be controlled using molecular seives, but I 
don't think that can easily be applied for cut negatives in filing sheets.

Essentially affects film since the 1950s. Triacetate was used for all 
35mm except I think some special emulsions such as Kodak High Speed 
Infrared, and also for some 120 film. So basically it is all on its way out.

Film, especially if washed well, is a very attractive substrate for 
moulds etc. I think fixer and other chemicals in low concentration are 
likely to offer some protection, although of course fixer will react 
with the image to give silver sulphide. Many if not most of my 
trade-processed slides are suffering irreversible mould damage, and also 
quite a lot I processed myself.

Proper storage of film is very expensive. It makes much more sense to 
produce good scans of anything worth keeping. You can also repair some 
damage on the scanned files.

Regards,

Peter

Peter Marshall
petermarshall@...     
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Mark Savoia wrote:

>Did you not fix them enough? How are you storing them? We print from  
>many old negs (1930's >) and see no deteriorating unless they were  
>not processed properly or stored incorrectly. Some look as good as  
>the day they were shot.
>Mark
>
>On Dec 12, 2005, at 2:50 PM, Peter Marshall wrote:
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>>which my analogue negatives are deteriorating
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