Andrew Grebneff wrote:
> We are talking here about chemicals in the glass causing the SHELL to
> break down, not the glass
> itself deteriorating. Shells can become reduced to a white powder. My
> affected specimens have
> not broken down yet, but are solidly encrusted by 2 different types of
> crystals, and cannot
> possibly be cleaned... unless an ultrasonic bath could do it.
I have cleaned them with distilled water in some cases.
--
Constantine Mifsud,
4, Shepherds' Str.,
Rabat RBT 02,
MALTA.
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