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

["edd" <edd.thompson@xxxxxxxxxxxxxx>]

----- Original Message -----
From: Tom Deering <photo-3d@xxxxxxxxxxx>
To: <photo-3d@xxxxxxxxxxx>
Sent: Saturday, June 17, 2000 8:03 PM
Subject: [photo-3d] CD-Rs = 200 years?


> On 6/17/00, Andy Beals wrote:
>
> >> I'm concerned that there isn't a digital storage medium
> >> currently available that will safely retain images for the
> >> long term.  I believe CDRs are supposed to be good for about
> >> 12 years if stored in ideal conditions.
> >
> >I think you're off by a factor of ten, there.
>
>
>
> How long is the life span of a CD-R?
>
> The life span of a recordable disc depends on several things:
>
> 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.
> See the manufacturer's information.
>
> 2.   Environmental factors: the lifetime of the disc may be reduced
> if is exposed to water, sun, or heat. Treating your recording media
> carefully will extend its life expectancy.
>
>
> Above from http://burningcd.com/faqs.html#span
>
> Tom
> ---
> tmd@xxxxxxxxxxx    http://www.deering.org
>
>
>
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.

edd