Re: [ARSCLIST] Memorex CDs - long reply on CD methodology

[Joe_Iraci@xxxxxxxxx]

It can be quite easy to strip the top layers off a CD. It all depends on
the quality of the overcoat layer. Theoretically, it is possible to
re-metalize the disc. However, the pits cannot be damaged during the
process. Also, you need a very clean plastic surface and vacuum deposition
of the metal to create a thin smooth layer. The metal needs to be the right
composition and thickness to ensure correct reflection properties. Not
something you can do easily or cheaply.

If its an audio or pressed CD, it is likely that there are many copies of
the same CD floating around, making the pursuit of such and endeavour kind
of redundant.

I believe the overcoat layer is in the 20 to 30 micron range, whereas the
metal reflective layer is 0.05 to 0.10 microns. Label can add another 5 to
10 microns.

Joe




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So, on a regular CD (not recordable)...could the protective plastic
layer be removed without affecting the pressed surface (which I
assume would be underneath the protective layer...right?). Or,
do the two plastics bond together in such a way that one cannot
be separated from the other?

And...how thick is the acrylic "overcoat?"

Steven C. Barr