Re: [photo-3d] CD-Rs = 200 years?

[Tom Deering <photo-3d@xxxxxxxxxxx>]

On 6/18/00, edd wrote:
>From: Tom Deering <photo-3d@xxxxxxxxxxx>

>> 1.   Color of disc: most makers of CD-recordable discs claim that the
>> green (cyanine) discs last up to 75 years, gold (phthalocyanine) last
>> up to 100 years and the silver-blue platinum last up to 200 years.

>im not sure, i dont have much faith in cdrs, ive had several die after 6
>months, with very carefull use. though they were music cds so they were used
>quite a bit so a pure data storge touched every 6 months would last ages.

Even Ektachromes "used quite a bit" won't last forever.

We bought a CD burner very early on, and I have burnt dozens of gold 
disks.  Just one has problems, and that is from a visible physical 
gouge on the label side.  Some files are gone, but much of the disk 
is still useable.  I have never had a problem with any of the others.

CD-Rs are certainly more fragile than regular CDs.  And contrary to 
what most people believe, it is the LABEL side that is most 
vulnerable, since that is where the information is stored.

The original question was about putting away images for future 
generations.  For that purpose, a CD-R should do nicely.  Make 
doubles and store them with the same care as Ektachromes, and you're 
bulletproof.

Tom
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