"Disc Rot", aka "Bronzing"
What is disc rot?
If you have any CDs manufactured by PDO between 1988-1993, you may have noticed a bronze discoloring around the outside edge of the label side of the CD on some discs.
This is what is known as "bronzing," or "disc rot." Along with this comes a gradual deterioration of data on the CD starting with the last track and moving inwards over time. The symptom of the deterioration is a crackling, staticky noise not unlike that of a scratchy vinyl LP.
Why does it happen?
Apparently the material used by PDO at the time (1988-1993) to seal the actual disc under the plastic did not sufficiently protect it from oxidization. Due to the exposure, the disc gradually gets eaten away. The acid used in the paper for the CD booklets and inserts plays a part in this as well.
How does it affect me?
Many of the groups on the World Serpent label (including Death In June, Current 93, Coil, and Nurse With Wound) have had CDs pressed by PDO during the disc rot years. These CDs may end up deteriorating over time, so you might want to check them over. Any CDs pressed after 1993 (including reprints) should be in no danger, however.
A list of World Serpent and pre-World Serpent CDs that may possibly be affected (1988-1993 pressings only):
Some other non-World Serpent titles that may also show disc rot:
This is by no means a complete list. There are certainly others not mentioned, and not all of the discs listed here may be affected.
What can I do about it?
PDO was taken over by Universal in 1998/9 and is in the process of being bought out by Disctronics
Send 'bronzing discs' to:
Universal assures there is one person who solely looks over these claims.
Please send discs in paper wallets or wrapped in tissue, not in the jewel boxes or with the printed parts.
Universal has said that if they cannot replace the discs, "an alternative is found between the customer and ourselves."