Mosaics

My question concerns two beautiful mosaics that are exhibited
outside but are under a roof. For a few hours a day about a third of
the surface is also hit by the sun. They were extracted "ages" ago
and the backing is made of concrete. They are potentially colorful
stone and ancient glass tesserae (of different hardness) but it
seems it's fading out.

What's the best to do to preserve and to enhance the colors?

Paolo Recanati
Conservator at the Conservation of Objects of the Israel Museum
Jerusalem


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                  Conservation DistList Instance 15:81
                   Distributed: Tuesday, June 4, 2002
                       Message Id: cdl-15-81-015
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