[ale] DVD life expectancy

[James P. Kinney III]

Looks like I got a batch that lower the overall average for DVD's by a
few years.

The article did not directly address the different types of optical
recording media, specifically, the different type of dyes used to make
the recordable layer. The process of making commercial CD's and DVD's is
very different from the home made variety. The commercial ones are made
with a layer of stamped aluminum. The degradation process for that is
the transparent plastic layer that sandwiches the reflective layer. For
the burned version, the dye layer is not nearly as reflective as the
aluminum. In fact, the dye layer is used as a dispersive layer so that
only the areas "burned" can actually have the laser reflected back from
the aluminum layer. In this case, the aluminum layer is blank.

On Sun, 2005-05-22 at 15:55 -0400, James Sumners wrote:
> Both in one shot --
> http://www.caps-project.org/cache/DigitalMediaLifeExpectancyAndCare.html
> 
> On 5/22/05, Jim Popovitch <jimpop at yahoo.com> wrote:
> > On the same note, but not wanting to hijack James' post, if you also
> > have similar info on CD life (esp. 5+ yearold CDs) I would appreciate
> > seeing that also.
> > 
> > tia,
> > 
> > -Jim P.
> > 
> > On Sun, 2005-05-22 at 14:50 -0400, James P. Kinney III wrote:
> > > Any clue as to the anticipated lifetime of a burned DVD? Not a
> > > commercial purchased, stamped variety (those should last a fairly long
> > > while).
> > >
> > > I have had a recent rash of failed DVD's all from the same batch. They
> > > _used_ to work but now I get errors.
> > > _______________________________________________
> > > Ale mailing list
> > > Ale at ale.org
> > > http://www.ale.org/mailman/listinfo/ale
> > 
> > _______________________________________________
> > Ale mailing list
> > Ale at ale.org
> > http://www.ale.org/mailman/listinfo/ale
> > 
> 
> 
-- 
James P. Kinney III          \Changing the mobile computing world/
CEO & Director of Engineering \          one Linux user         /
Local Net Solutions,LLC        \           at a time.          /
770-493-8244                    \.___________________________./
http://www.localnetsolutions.com

GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
<jkinney at localnetsolutions.com>
Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
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