[filmscanners] Re: How to label CD backups

["Arthur Entlich" <artistic-1@shaw.ca>]

Maybe.  There are several potential problems with the labels (I use them
for non-archival CDs)

The chemical components within the adhesive:  Many adhesives are not pH
neutral, and also many change chemically over time.  The adhesives often
contact plasticizers which may migrate through the lacquer coating on
the CD which protects the metallic and dye layers.  Further, the inks
you use on the top of the label can also migrate down, or react with the
adhesives, which may create a new chemical mix.

Then there is the issue of the possibility the label adhesive will
shrink or expand or both, at different rates than the disk, and this
could cause stress on the lacquer and data surfaces.

However, just to add to your paranoia, it is even possible some of the
lacquers used to protect the metallic and dye layers could, over time,
degrade and damage those layers.

  Who knows, maybe those adhesive labels may actually protect the disk
from failure, by providing additional light and physical protection from
environmental antagonists.

Anyone got a magic "8" ball? ;-)

Art

Kip Babington wrote:

> May I ask a background question in this thread?  Specifically, what's the
> source of the underlying assumption that you shouldn't use labels on CDs?
>
> I've just begun to archive images (onto Kodak Gold CDRs) and have been
> using a very thin, full size label that I got from one of the online
> vendors.  I print some generic stuff on it with my printer (Photo Backup,
> Contact Sheets, etc.) and then write on the label (using a fine Sharpie)
> the unique info for the particular disc.  I know that all the info I put on
> the label wouldn't fit on the clear hub of the disc, no matter how small I
> could write, and I'd rather not have to maintain a separate index of what's
> on "disc 23."
>
> Are the things that can go wrong with labels worse than what people are
> worrying about with using inks directly on CDs?
>
> Cheers,
> Kip
>
>
>


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