Barrier materials

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I've been researching and discussing polyvinyl acetate varnish film
used by us in cataloguing ethnographic artifacts.  Are there other
products that work as well or better than this?  It seems to be
reversible if it is applied in a form that tends to adhere to but
not penetrate too deeply into woven objects.  Porous materials like
baskets are subject to absorbing quite a lot of the varnish in its
dilute form.  Can you give me some advice or suggest some one who
can?

John Rumming, Curator of Collections
California State Museum Resource Center
West Sacramento, CA 95691

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                  Conservation DistList Instance 12:1
                 Distributed: Wednesday, June 10, 1998
                        Message Id: cdl-12-1-018
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