About Compact Disk (CD)

[Aria abbasi]

Hello all,

I have some questions about Compact Disk (CD).

1- What is the difference between the material of CD-R and CD-WR?
2-What the polycarbonate level of CD for?

Thanks in advance.

 

[Someone Somewhere]

1) Do you mean CD-RW? If so, CD-RW discs can be erased and reused, though not indefinitely. They use a metallic alloy instead of a dye.

2) I'm guesssing mainly rigidity - it's the thickest part of the disc.

 

[Aria abbasi]

Thank you very much.