Glass Identification - Post here for all ID requests > Glass Animals & Figurines

Got a technical question?

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Frank:
Very useful, so all of the older stuff will be soda lime? i.e. http://www.ysartglass.com/Pirelli/Pirellianimals1.htm

Borolamper:
Yes, those look like soft glass colours to my eye, even ignoring the dates. No reduction of the transparent greens (in boro, copper dioxide transforms to copper oxide on the surface unless silly amounts of oxygen are used, giving it a reddish skin or streaks). The opaque yellows and oranges (cadmium) have only become available in boro in the past few years, and are prone to boiling.

Frank:
That is extrermely useful as the popularity of lampwork figures is growing and this will make it easier to separate the older from some of the new. Won't help where soda lime glass is used but it does at least help in dating etcetera.

David E:
Is cadmium still being used then? I thought this was a real no-no, being so harmful.

Borolamper:
Sealed inside the glass it is safe enough.

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