Charcoal cloth

I have been looking into the use of activated charcoal cloth to help
prevent further corrosion of a number of lead coins in an unsealed
display case with some wooden components but have had trouble
locating much information that would help to determine the lifetime
of charcoal cloth.

Does anyone have any experience or information regarding how
frequently charcoal cloth should be replaced based on the type and
size of the showcase and pollutant levels? Alternatively, has anyone
found any reliable indicators that can be placed in a display case
to help determine when charcoal cloth should be changed?

Alexandra Zappa
Conservation Intern
Fitzwilliam Museum
Cambridge, UK


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                  Conservation DistList Instance 25:35
                Distributed: Saturday, January 28, 2012
                       Message Id: cdl-25-35-022
                                  ***