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On 30/01/04, Art Shifrin wrote:
> "I have shellac records over a century old which exhibit no
> deterioration other than wear!
> Steven C. Barr"
>
> How do you know that the disks have not in some way changed or
> deteriorated?
>
> Yes, they're playable but even glass changes shape over time.

I saw an exhibition of Roman glass a few years ago. Those bottles etc
didn't show any signs of having changed shape over 2000 years.

Regards
--
Don Cox
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