Longevity of DVD-R and CD-R (Was MagTapes)

[woodelf]

Eric Smith wrote:

>Yes.  They are laminated with adhesive, just as laser videodiscs were.
>The adhesive leaks O2 even when it's working well, and as it degrades
>it leaks worse.
>
>Laser videodiscs have higher mass, so the problems occur faster, but
>there's no reason to expect that the same problems won't happen to
>DVD media.  With laser videodiscs, the problems do start closer to
>the outer edge, but they very rapidly (in a few weeks to a month)
>progress to affecting the entire disc.  I expect that DVDs will
>behave similarly, though not quite as quickly.  So not using the
>edge will gain you a little, but not a lot.  Not enough that you
>should reduce your concern by any significant amount.
>
>  
>
But not writing near the edge will help with finger prints.
Also the surface of some CD's can be easly scraped with a finger
nail. I did that trying to get a CD out of a paper sleeve.
Ben alias woodelf.