Re: Labels & blank cd's
- From: "Jack Lowe" <akronjack1982@xxxxxxxxxxxxx>
- To: <jfw@xxxxxxxxxxxxx>
- Date: Sun, 16 Jan 2005 11:43:39 -0500
Well, speaking just for myself. I never put labels directly on any of my
CD's. I have Braille labels on the jewel cases. The only time I would
think of putting a label on the actual disc would be if it's a compilation
that I made, and could easily replace. And, I'll only use a round label
that's the same size as the disc so as to keep the rotation of the disc
balanced while playing.
For those who don't know, here are a few facts about CD's you might find
interesting.
CD's play from the center outward. The first track is toward the center of
the disc, and the last track is close to the outer rim.
When CD's start playing the first track, they are spinning at 500 RPM.
By the time they are playing the last track, they are spinning at 200 RPM.
The reason for the slower speed is that the data is spread out over a larger
surface area. The center of the disc is more tightly packed and therefore
has to spin faster.
When you are using a data CD, such as the Jaws disc, it can spin as high as
12 thousand RPM.
Have you ever heard your CD ROM drive really take off when you put a data
disc in to it? Now you know why it sounds that way. Jack
----- Original Message -----
From: "Francis Daniels" <fdaniels@xxxxxxxxxxxxx>
To: <jfw@xxxxxxxxxxxxx>
Sent: Sunday, January 16, 2005 11:15 AM
Subject: Re: Labels & blank cd's
> Jack, TerriLynne and listers,
>
> I need to post this, as some listers may get the impression that
> non-commercial CD labels are appropriate and not harmful. This is far
> from
> the case. Fred Langa's web site (www.langa.com) discusses data loss and
> degrading of data due to the solvent in the glue that holds the label on
> the
> CD. See his article http://www.langa.com/newsletters/2004/2004-12-20.htm
> on
> CD and DVD printers and how long data storage will last with these labels.
>
> In addition, the Council on Library and Information Resources and National
> Institute of Standards and Technology
> (http://www.clir.org/pubs/reports/pub121/contents.html) lists a guide for
> the care and handling of CD data discs that will guide you in using this
> medium. I'm not posting this to blow anyone off; it is a very real
> concern
> if you want your data to survive.
>
> I know a few have explored this issue last month on this list. The
> consensus was that braille labels could be used on the case, but not on
> the
> CD itself. It will affect the rotation while the CD is in the player.
>
> Francis
>
>
> --
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