You said, "The glass is coloured, predominantly blues, greens and yellow." That means the salt crystals could not only contain lead but cadmium, chromium, cobalt, and a host of other toxic metals. Was any of the weeping and crystal material kept? Monona Rossol
------Original Message------ Dear Trude, At the National Museums Scotland we have treated 3 pieces of contemporary designed Murano glass vases designed by Michele de Lucchi for Memphis, Milan, and made by Toso Vetri d'Arte, dating from 1983 which have shown evidence of weeping and formation of salt crystals. The pieces are on display , we washed the glass to remove surface salts and dried them. and have displayed them at 40% RH using passive control ( conditioned pro-sorb cassettes). The vases have been on display for 4 years , we continually monitor for signs of redeveloping weeping but as yet not observed anything . The glass is coloured , predominantly blues, greens and yellow. ------------------------------ Charles Stable Artefact Conservator National Museums Scotland Edinburgh 4401875614657 ------------------------------ Reply to Sender : https://community.culturalheritage.org/eGroups/PostReply/?GroupId=481&SenderKey=6ea82495-27fc-43b2-804c-b5004e98b727&MID=9041&MDATE=756%253e465469&UserKey=d16eaa87-0f69-494b-9f2f-303dbc1222e1&sKey=fab9aa4f27a04c5d876e Reply to Discussion : https://community.culturalheritage.org/eGroups/PostReply/?GroupId=481&MID=9041&MDATE=756%253e465469&UserKey=d16eaa87-0f69-494b-9f2f-303dbc1222e1&sKey=fab9aa4f27a04c5d876e You are subscribed to "Global Conservation Forum (ConsDistList)" as [email protected]. To change your subscriptions, go to http://community.culturalheritage.org/preferences?section=Subscriptions&MDATE=756%253e465469&UserKey=d16eaa87-0f69-494b-9f2f-303dbc1222e1&sKey=fab9aa4f27a04c5d876e. To unsubscribe from this community discussion, go to http://community.culturalheritage.org/HigherLogic/eGroups/Unsubscribe.aspx?UserKey=d16eaa87-0f69-494b-9f2f-303dbc1222e1&sKey=fab9aa4f27a04c5d876e&GroupKey=757a8f16-505f-4323-8e74-e376757aa9f7.
