Rehousing 16mm triacetate

I am faced with a small concern that I would like to address mostly
to those with film preservation backgrounds.

We are rehousing 16mm triacetate film within our cool storage vault.
They are currently 'stacked' within a cardboard 'pizza box' type
container, one reel on top of the other as they sit horizontally.
They came from the lab like this many years ago. On the top we have
16mm print film, on the bottom is the accompanying soundtrack (16mm
full-coat mag).

We are going to rehouse into ventilated polypropylene cans. We would
like to keep the rehousing to a 1:1, whereby we relocate from one
'pizza box' to one ventilated can. Because it is 16mm, we can
continue to stack them within a 35mm ventilated can, and the vendor
(Stil) manufactures a 'hub' which physically separates the two 16mm
prints within the can, so they not only don't touch, but there is
airflow around much of each reel.

My concern is that triacetate full-coat magnetic audio stock is
believed to be more susceptible to vinegar syndrome than its picture
film counterpart. Therefore, while we ideally want to keep them in
one can for object-record purposes (collections database), I am
slightly concerned about the more susceptible mag stock affecting
the other. Having said that, they will be in optimal cool storage
and in ventilated cans, which should mitigate deterioration
considerably.

Does anyone think this is a problem, and if so, why?

David Stevenson
Restaurateur
Conservator
Centre Canadien d'Architecture
Canadian Centre for Architecture
1920, rue Baile
Montreal, Quebec H3H 2S6
514-939-7001 ext 1204
Fax: 514-939-7020


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                  Conservation DistList Instance 25:27
                Distributed: Saturday, December 3, 2011
                       Message Id: cdl-25-27-010
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