This was an issue back in the late 1980s/early1990s and dealt primarily with discs manufactured for Hyperion. This was attributed to discs manufactured by a specific CD pressing company, and dealt with a lacquer coating that eventually allowed air to reach the aluminum 'data' layer and cause oxidation. Most of the labels that used this particular manufacturer were classical in nature (e.g., Deutche Gramaphone, Archiv).
http://www.classical.net/music/guide/society/krs/excerpt3.php
Of my 2,000 cds, I have had only 2 discs become unplayable: both were HYperion label and both showed discoloration suggesting oxidation of the aluminum layer. None of my other discs, including ones dating back to the mid-1980s, all still play with no problem.
http://www.classical.net/music/guide/society/krs/excerpt3.php
Of my 2,000 cds, I have had only 2 discs become unplayable: both were HYperion label and both showed discoloration suggesting oxidation of the aluminum layer. None of my other discs, including ones dating back to the mid-1980s, all still play with no problem.