CD-R reliability

I dont know if this is off topic on this newsgroup but I have problems with some of my CD-Rs which are 1 or 2 year old. The movies on them begins to show signs of data lost. When the movies are played, large image blocks sometimes appear. I know for sure the originals do not have them. The CD_Rs are Maxell, Fuji films and Sony. I am quite sure it is not the CD recorder because I always watch the recorded movies right after the recording to make sure they are in good quality. I store the CDs in a cool place without any UV.

Anyone else has the same problem? Is there a brand of CD-Rs with guarantee longevity, like 60 years or so?
-=-
NOTE: This message was posted via one or more anonymous remailing services.

 

Sony claimed a 10 year lifetime for CD's on their web site. They said it was due
to physical effects as the plastic shrunk. I'm sure they were being pessimistic, as
we've all seen good CD's older than that. But it seemed like a good explanation
for a potential problem down the line.

 

Kodak Gold and Gold/Silver CD-Rs used to be quoted at 50 yrs+ working
life if stored in appropriate conditions. Kodak have discontinued
these CDs but may have some old stock available.

http://wwwuk.kodak.com/UK/en/digital/shop/

If Kodak were confident in their special metal film technology I see
no reason why other makers might not achieve similar claimed
reliability.

I have had occasional failures with other makes, but never Kodak. I
did a little test - recorded two disks, one a "Premium Grade"
unbranded and one a Kodak. Left them naked and label side down on the
back shelf of a car which was parked outside, in sun for at least half
the day, from November to March, checking the disks every few days.
That is, plenty of full sun, and temperatures varing from below
freezing to hot to the touch, and humidity varying from condensation
on a frosty disk to dry. I took some care not to let them get
scratched or knocked about and cleaned them very carefully and
cautiously before testing.

The anonymous disk gave no errors at all for 30 days and then suddenly
became completely unreadable. The Kodak disk still seems perfect,
though I am no longer torturing the poor thing.

Hardly scientific or conclusive. YMMV but it's suggestive
nevertheless.

Regards

AJB