Digital BW, The Print

Jonathan S. Farley, Senior Conservator at Royal Botanic Gardens did
comprehensive study of Bell Labs "Corrosion Intercept"
technology as used to protect CD/DVD's:

CD_Instert_Report
<http://www.conservation-by-design.co.uk/corrosioninterceptpdfs/CD-Inser\
tfinalreport.pdf>

His findings about CD Jewel Cases were interesting. Here is a quote from
page 17 in the conclusion:

"The most deleterious factor in the CD's environment which will
contribute to its decay is the Jewel Case in which it is supplied. Acid
off gassing as a result of poorly chosen materials in the products'
packaging can reduce the longevity of a CD to decades rather than the
centuries predicted by most manufacturers…As a consequence, unless
Jewel Cases undergo a radical redesign, the presence of deleterious
plasticizers will be continued requirement, and a continued threat to
the longevity of CDs. Not one commercial CD manufacturer will admit
publicly that their CDs are manufactured from decayable materials which
can be affected from deleterious factors in their immediate environment.
As a consequence of this, many packaging manufacturers pay little, or no
attention to their choice of materials."

My company resells CD/DVD protective storage cases and jewel case
inserts and we have a sale on them going on right now for 15% off via
discount code: FDPSAC7

Cheers, Mark
http://www.pbase.com/lila161 <http://www.pbase.com/lila161>
http://www.framedestination.com/ <http://www.framedestination.com/>


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "David"
<dkfreed@...> wrote:
>
> The degredation of CD/DVD media has been known for a while. There are
> archival quality gold reflective layer CDs and DVDs that you can use.
> According to manufacturers, they will last up to 200 years.
>
> The life span of regular CDs and DVDs (like you buy cheap at Staples)
> are much less -- I've heard 50 years on the high end, but down to 5-
> 10 years on the low.
>
> The only thing is, in 75-100 years will there be the hardware around
> to read these disks, or will it be like Beta video tapes and 5 inch
> floppies.
>
> Best, David
>
>
>
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Richard
> Smallfield r.smallfield@ wrote:
>
> > Good thing it wasn't written on a CD-R.
> >
> > So silver negatives are a good thing to have.
> >
> > Food for thought,
> > Richard
> >
>




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