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Subject: Benzotriazol


From: Howard B. Wellman <hwellman>
Date: Friday, May 18, 2007
Sabine Brechbuhl <sabine.brechbuehl [at] erz__be__ch> writes

>Can a bath of benzotriazol, BTA 3% in ethanol during 24 hours
>(according to D. A. Scott, Copper and Bronze in Art), penetrate
>enough and if so, is this stabilisation effective even on a
>consolidated object?

I do not expect that the BTA will penetrate effectively through the
B-72 consolidant to bond to the copper alloy substrate.

Ideally, you should remove the B72, then apply the BTA by immersion
under vacuum, then reconsolidate as necessary.

Howard Wellman
Maryland Archaeological Conservation Laboratory

                  Conservation DistList Instance 21:7
                   Distributed: Monday, May 28, 2007
                        Message Id: cdl-21-7-005
Received on Friday, 18 May, 2007

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