Re: material of HDs?

[supertimer@aol.com (Supertimer)]

"Adalbert Goertz" <goertza@fatalerr.com> wrote:

>What is the material (alloy) used for HD or CDs?
>Is there any nickel, cobalt in it?

I think glass and/or aluminum for hard disk platters and
plastic and aluminum for CDs.  The aluminum in the CD
is a very thin disc that does the actual storing.  The
plastic is just to protect it and make it stiff enough for
humans and the CD player or CD drive motor to handle
it.