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Subject: Removing sulfate from azurite polychromy

Removing sulfate from azurite polychromy

From: Eric Miller <emiller>
Date: Friday, June 21, 2002
Susan White <smwhitewhite [at] netscape__net>

>I am treating a 14th c. marble Madonna for the Duke University
>Museum and have a situation where a thin, discolored (by iron oxide
>and carbon) sulfate layer covers original azurite polychromy. ...
>... Does any one have a suggestion as
>to how best to attempt the removal of the sulfate layer over the
>azurite so as not to risk loss of the pigment?

If you have access to laser cleaning equipment it would be worth
testing it on the sulfate layer.

E. Miller

                  Conservation DistList Instance 16:3
                  Distributed: Thursday, June 27, 2002
                        Message Id: cdl-16-3-005
Received on Friday, 21 June, 2002

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