> 5.7 CONSOLIDANTS AND ADHESIVES
> …Among the adhesives and consolidants that are considered to be safe
> and
> archival are polyvinyl butyral (Butvar 76 and Butvar 98)

Polyvinylbutyral is also made by Hoechst (Germany) as Mowital, in a number
of grades. I use this for fossils. It is a consolidant, but can be used as
an adhesive; some grades (Beg H66) dissolve in ethanol, all dissolve in
acetone.

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