Re: Labels & blank cd's

  • From: "chevelle" <chevelle33@xxxxxxxxxxx>
  • To: <jfw@xxxxxxxxxxxxx>
  • Date: Sun, 16 Jan 2005 13:42:32 -0500

Hi Jack, thanks for that. I didn't know the speed cds spin, and I was 
curious why when I put the disk it sounds really fast.
----- Original Message ----- 
From: "Jack Lowe" <akronjack1982@xxxxxxxxxxxxx>
To: <jfw@xxxxxxxxxxxxx>
Sent: Sunday, January 16, 2005 11:43 AM
Subject: Re: Labels & blank cd's


> 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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