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Re: OT: labelling CD/DVD disks



On Sunday 22 October 2006 19:39, Dotan Cohen wrote:
> On 22/10/06, Anne Wilson <cannewilson tiscali co uk> wrote:
> > For years I have applied paper labels to CDs, using an aligning tool, and
> > never had a problem.  Around the time I got my first DVD burner I read
> > that, because DVDs have a denser ring population, they are less tolerant,
> > and one should not apply labels, but use only a pen.
> >
> > ISTR that a couple of months ago someone on this list remarked that this
> > is nonsense.  Does anyone care to share their experiences with me? 
> > Thanks
>
> That information is backwards. In regular 650MB-700MB CD's, the
> recorded layer is very near the label side (not laser side) of the
> disk. Therefore, scratches on the label side are more dangerous to the
> data than scratches on the laser side. DVD's, on the other hand, have
> the recorded layer exactly in the middle, so is is protected from both
> sides.
>
> However, you should not apply paper labels to a disk because it will
> upset the disk's balance. This might not be a problem n an audio disk
> that is spun at 1x speed maximum. However, a data disk that is spun at
> x52 speed is very sensitive to balance. Also, the paper could intefere
> with the tight tolerances of CD players, notably those found in cars.
>
> Always use a FELT TIP marker to mark CDs. A regular ball point will
> very likely scratch the label side of a CD, thereby damaging the
> recorded layer.
>
Hmm - I have paper-labelled CDs full of photos for years, and never had a 
balance problem.  I do think, though, that a proper mounting/aligning tool is 
necessary to avoid this.

Thanks for sharing your thoughts

Anne

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