Thank you all for your replies and information, a lot of great insights.
I will definitely test for lead now- good to know!
Best wishes,
Trude
Trude Ellingsen
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National Gallery of Victoria
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------Original Message------
How very interesting about the oil. I got my MFA in glassblowing in 1964 and
in all these years of following glass, I never knew that. But it makes perfect
sense. And if it is a natural oil, those double bonds are going to oxidize and
set up the oil over time. The metals in the glass will even catalyze that
reaction.
However, the surface schmutz tested alkaline. That argues more for leaching
of the glass from humidity and air pollution. And being a chandelier, you
certainly want to use a lead test on it before you clean it. Lead and lead
compounds also skin-absorb -- a fact that somehow doesn't get into the
literature much. Absorption through the skin now is known to be a significant
additional route of entry in the lead industries.
Do let us all know what you find out. It's so interesting.
Monona Rossol
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