Re: arsclist Irradiation of mail

[Mike Richter <mrichter@xxxxxxx>]

At 10:23 AM 5/14/2002 -0700, Jerome Hartke wrote:
> Information posted below seems a bit anecdotal. Past postings are
> confusing because they have not been very specific. Steve's comment
> regarding "heavy dosage" is not clarifying. "Significantly powerful"
> anything, including bulldozers and nuclear explosions, can destroy CDs.
>
> Regarding x-rays, they do not damage media but the powerful magnets in
> x-ray machines can erase magnetic media that is placed in proximity to
> the magnets.
>
> Regarding CD irradiation, information posted by Media Sciences at
> http://www.mscience.com/faq29.html is specific in terms of electron beam
> energy, dose, using values represented to be in current use by the USPS.
> Media Sciences does not wish to guarantee any results, but our results
> do show that media degradation by irradiation of the mail is minimal.
>
> If readers are unclear about USPS procedures, they contact their USPS
> consumer affairs office or USPS packaging specialist.

One footnote to Jerry's admirable summary, if I may:

There have been reports of damage to erasable media from airport scanning. 
Given the recording mode on "CD-RW" and properties of modern media, that is 
relatively credible, but I've found no confirming reports in what might be 
considered scientific analysis or test.

Mike

mrichter@xxxxxxx
http://www.mrichter.com/


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