From: Patent Tactics, George Brock-Nannestad
Graham Newton reminded us of molecular sieves:
we know examples, such as active carbon or silica gel; in the form of
tailored zeoliths they are able to trap (by adsorption) and retain various
types of molecules from the air. They have a huge internal surface, and their
openings may be tailored to suit the molecular weight of the substance you
want to remove. You need quite a lot if it actually, but Kodak was quite
active for a period about 20 years ago. The small strip is an indicator strip
for when you need to do something about your acidity, made by Image
> David Breneman wrote:
> > This is a little off topic because it is a film question,
> > but I'm hoping someone here has experience with this. I
> > have an episode of the "Perry Mason" TV series which is
> > in an advanced state of vinegar-syndrome decomposition.
> > It's badly buckled, cloudy, and makes my whole garage
> > smell like photo fixer. But, I'd like to salvage the
> > reel and can if possible to use as a takeup reel. This
> > is a 2500' Plio-Magic plastic TV reel, and they're
> > getting hard to find. The can is a 2000' Goldberg
> > Brothers metal can. Is there any way to sanitize
> > these so they are safe to use for takeup (not to store
> > a film on/in) or is the cause hopeless? Thanks to
> > any who can answer.
> Hello David and all...
> I recall reading about a Kodak product which I think was called a molecular
> sieve designed to affect the syndrome either from progressing further or to
> reverse it, I don't remember which. I believe it is a small strip designed
> be put into the film can of a roll exhibiting vinegar syndrome.
> Do some searching on the Kodak site for more details on this.
> From your description, the film you have is probably beyond recovery, and I
> would suggest you consign it to the garbage after stripping the film (use
> rewinds and a split reel with a plastic core) from the reel you want to
> Do this outside, and thoroughly wash the reel and can (and the split reel!)
> with Windex then rinse with water and allow to air dry for a few days.
> After everything is dry, check carefully for any trace of vinegar smell and
> repeat if necessary.
> ... Graham Newton
> Audio Restoration by Graham Newton, http://www.audio-restoration.com
> World class professional services applied to tape or phonograph records
> consumers and re-releases, featuring CEDAR's CAMBRIDGE processes.