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Hallo and Happy New Year! Blue and green beads attract “glass
illness” much more frequently than any other colour beads. The reason
appears to be the copper in the blue and green pigment that accelerates the
process. Even small amounts of formaldehyde appear to be a strong catalyst, and
a low ph is needed to start the process. Once the process has started the
relative humidity should not be kept to low, i.e. not under 45%, but low temperatures
will slow it down. As far as I know wet cleaning is not recommended for beads
in that condition. I am afraid that this information will be no big help to you.
They come from seminary on beads in Berlin. Angelika Riley Textilrestaurierung/Textile Conservation Museum für Kunst und
Gewerbe Steintorplatz D-20099 Hamburg Tel: 0049/40/428 54 27 53 Fax: 0049/40/427 92 92 35 |