On Friday, June 28, 2002 at 14:26, Wayne Harridge
<olympus@xxxxxxxxxxxxxxx>
wrote re "Re: Re: [OM] Re: archive slide sca" saying:
> > Tom@xxxxxxxxxxxxx <Tom@xxxxxxxxxxxxx> wrote:
> >
> > Doubt what you want, but good CD plastic, properly stored, has a two
> > century life. It is inherently more stable chemically than film,
> > especially
> > colour, negative or positive.
>
> Ok, show me your 2 century old CD ! That is an *estimate* (if I'm not
> mistaken).
> Correct me if I'm wrong, but I believe that in a common home written CD a
> *dye*
> is used to record the data, unlike music CDs which have a metal (aluminium ?)
> medium. The plastic just supports the recording medium.
See http://www.kodak.com/country/US/en/digital/cdr/tech/lifetime.jhtml
Try storing your film at 80C and 850midity.
Kodak suggests a lifetime between 443 and 5,083 years for their gold
Ultima disc. That's lots better than RC paper, even CibaChrome.
See http://www.kodak.com/global/en/service/tib/tib4300.shtml for
storage tips. Elsewhere, I've read that the lower-capacity discs are
better. Choose 62 min in preference to 74, 74 in preference to 80.
We'll just have to wait...
> > You should save the software as well as the data.
> > You may want to keep some hardware too....
> > The CD format should be popular for another decade or two, and
> > accessible
> > for another decade past that.
>
> And don't forget to keep *multiple* copies of those CDs, just in case the
> plastic
> turns back into tar and the dyes decompose !
In different locations. Try that with tintypes!
There's an old salt mine somewhere where their business now is
archiving data & storing it - I've seen pix.
Tom
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