I don't think anyone loses data because of oxidized aluminum. It is
the dyes that contain the bits that fade in two years. Admittedly
some dyes are more permanent than others.
Winsor
Long Beach, California, USA
On Jan 3, 2007, at 10:30 AM, Chuck Norcutt wrote:
> Sounds like you missed the discussion of CD longevity (or lack
> thereof)
> from a few weeks back. If you're going to use CD's or DVD's you must
> use the gold ones. Normal CD's and DVD's have a thin layer of
> aluminum
> sputtered on the plastic which is then covered with a thin layer of
> lacquer. Ultimately, water vapor and oxygen find their way through
> and
> around the edges of the lacquer and oxidize the aluminum... thus also
> oxidizing your image bits.
>
> The gold stuff won't oxidize but you'll pay much more for them.
> But if
> accelerated aging tests are to be believed 50-100 years life should be
> expected.
>
> <http://www.encoredataproducts.com/Gold-Archival-Gold-Media-p-1-
> c-344.html>
>
> You can get a 5% discount here by using a discount code "TOP5" when
> checking out your order. I found that on Mike Johnston's site but
> can't
> seem to locate it again.
>
> While looking for that I also found this interesting link which
> makes a
> strong technical argument for the use of DVD+R media based on
> significant improvements in error correction methods over other DVD
> media types.
> <http://adterrasperaspera.com/blog/2006/10/30/how-to-choose-cddvd-
> archival-media/>
>
> Chuck Norcutt
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|