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Re: [ARSCLIST] Preservation media WAS: Cataloguing still :-)
On 04/09/06, Dnjchi@xxxxxxx wrote:
>
> In a message dated 9/4/2006 10:28:05 AM Eastern Daylight Time,
> doncox@xxxxxxxxxxxxxx writes:
>
> The signal on a manufactured CD is basically the shape of a piece of
> plastic, just like a vinyl LP.
>
>
>
> Is a CD pressed onto the plastic? Or onto the aluminum core?
The pits are moulded in the plastic (polycarbonate), which is then
coated with a reflective metal (aluminium or gold).
The metal layer is then varnished, and usually printed over.
Regards
--
Don Cox
doncox@xxxxxxxxxxxxxx