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Subject: Beva film

Beva film

From: Jack C. Thompson <tcl>
Date: Tuesday, November 17, 1998
Barbara Appelbaum mentions the persistent smell of BEVA-371's
solvents.

A few years ago Eric Lawson reported on a project of his, the
restoration of wood fragments of the Mayflower ship enshrined in the
arch between Canada and the US at the western border between British
Columbia and Washington state.

As I recall, the wood was impregnated with an acrylic dissolved in
Toluene. Following treatment he decided to evaporate the solvent and
determine the quantity of acrylic deposited in the wood by
subtracting the quantity of acrylic remaining from the total weight
of acrylic dissolved.

After a year or so, the solvent was still evaporating.  I don't know
if it has finished evaporating yet.

Just another (vague) data point.

Jack C. Thompson
Thompson Conservation Lab.
7549 N. Fenwick
Portland, OR  97217
503-735-3942  (voice/fax)

                                  ***
                  Conservation DistList Instance 12:45
               Distributed: Wednesday, November 18, 1998
                       Message Id: cdl-12-45-005
                                  ***
Received on Tuesday, 17 November, 1998

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