Removing PVA

Can anyone suggest suitable solvents for the removal of old,
non-water reversible, bookbinder's PVA adhesives that have been used
on the back of bound sections? A bookbinder colleague tells me that
he has found the likes of Pliansolve (a thinner usually used in
connection with Pliantex, a restorative for leather damaged by red
rot) but wonders if some other product might better suit. Might
enzymes be used and if so what type would be best?

Mark Vine
Conservation Resources, England

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                  Conservation DistList Instance 9:64
                  Distributed: Sunday, March 17, 1996
                        Message Id: cdl-9-64-012
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