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Burned CDs degrade because their method of writing is a chemical change. Pressed CDs do not suffer the same problem.

• TonyTrapp 5y ago
  Some bad pressings do - but it's true that the majority of pressed CDs remain readable.
• deleted 5y ago
  [deleted]
• mark-r 5y ago
  Pressed CDs decay because the reflective aluminum layer oxidizes. The bottom of a CD is a pretty impenetrable plastic, but the top is just painted on.