Mold on stone

Shelley Reisman Paine <shelley [at] srpaine__com> writes

>I am working on a set of oversize outdoor sculpture made from
>Carrara marble.  The sculpture stood outdoors for sixty years. After
>it was vandalized in 2000 the owner stored them for five years in 4
>crates (9.5 feet x 4 feet x 4 feet) filled with straw.  While in
>storage large dark gray areas developed.  Mary Lou Florian
>identified the material as alternaria or cladosproium.  The fungal
>structures are not normal hyphae but sclerotic--heavily pigmented
>(melanin) hyphae.

We have an environmentally friendly microemulsion masonry biocide
product called Microtech Biocide 25X containing 2.5% of Iodopropynyl
butyl carbamate which might be of use.

Microtech Biocide is a non-flammable concentrate which when mixed
with water has proven extremely effective in the removal and
prevention of moulds, algae, mosses and lichens on both interior and
exterior surfaces and in the treatment of dry rot.

Further information including technical sheets is available from our
offices in England.

Mark Vine
Conservation Resources (UK) Ltd
Cowley, Oxford
England


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                  Conservation DistList Instance 19:29
                 Distributed: Tuesday, December 6, 2005
                       Message Id: cdl-19-29-012
                                  ***