In a message dated 25/2/03 6:14:38 AM, triffid  writes:

<< 
WRONG. All the Cds are now unreadable. Examination shows there has been an
interaction between the sleeve and the surface of the CD which now looks as
if its has a bad attack of moire pattern! Furthermore I have found similiar
"staining" on CDs stored as recently as Aug 2002

Clearly the only way to store CDs are in a jewel case where no contact is
made between the surface of the CD and any possible contaminents in paper
sleeves etc.

Obviously there are other factors which could affect the CD - humidity at
time of creation etc - but it is clear that with so much at stake over long
term storage one should reduce all possible risks.

I have failed to do so and paid the price - so do not use slip sleeves for
CD storage.

 Mike Sheil [ chastened & gutted! ] >>

Dear Mike

Did you verify all the disks by opening a few files when you burnt them?

Did you store the CDs in the dark?

Is the pattern washable? 

Probably the best storage system for archive Cds is the Secol system. 

I am now learning that humidity is the biggest single factor in all longevity 
issues. I have a de-humififier running continuously. Holding inkjet paper in 
front of a electric heater for a few seconds before printing increases the 
longevity of the inks and shortens the cure time. 

Bob Croxford

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