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Thank you --this is helpful, and somewhat what I expected. I have even seen 
"FDA approved" medical discs listed from a company I have used, Polyline:

<http://www.polylinecorp.com/productlist.asp?OPT=850010000300001000>

Again, I am not sure what this means. Maybe, since these are pre-printed, 
it has to do with the kind of ink they use.

Thanks again for all the info.

Marcos

--On Tuesday, April 25, 2006 2:31 PM -0400 "Richard L. Hess" 
<[log in to unmask]> wrote:

> You all know that MAM-A is the company that is now selling Mitsui discs.
> I don't know all of the corporate maneuvering that went on behind the
> scenes, but it is still the Mitsui technology, and I think the Colorado
> plant is the same one where Mitsui made their discs.
>
> I asked Joe Weisenbach of MAM-A a very pointed question:
>
> What is the difference (other than marketing) between the Medical and the
> Archival Gold CD-Rs
>
> His answer: NONE
>
> Here is some info that might be of interest:
> http://www.mam-a.com/technology/quality/longevity.htm
> http://www.mam-a.com/technology/quality/durability.htm
> http://www.mam-a.com/technology/technical_papers/index.html
>
> Here is their description of the difference between regular gold and
> archive gold:
>
>> What's the difference between Standard MAM Gold and Archive Gold?
>>
>> They are both produced on the same production lines, but the Archive
>> gold is the "cream of the crop." We always sample from production to
>> test quality, and sometimes the quality is exceptionally high (of
>> course it's always within our specifications). At these times we
>> pull the gold product, sampling it at a high frequency to ensure
>> it's consistent high quality. This is what becomes Archive gold..
> from: http://store.mam-a-store.com/standard---archive-gold.html
>
> In the store site, medical points to the same page as above.
>
> In the non-store site, here is the link to the medical page:
> http://www.mam-a.com/products/medical/index.html
>
> Note that this direct-sales store Web site (better prices are available
> through dealers) shows $1.35 each for bulk regular gold and $1.60 each
> for bulk archive gold.
>
> I would also like to point out that MAM-A has finally come out with a
> gold archival DVD and some of the information at their Web site looks
> promising as to longevity: These are shown at $2.99 each.
>
> <http://www.mam-a.com/products/dvd/Archive_gold.html>http://www.mam-a.com
> /products/dvd/Archive_gold.html
>
> I am in the process of switching to the Archive Gold CDs (as I use up my
> regular gold CD stock) and am already using the Archive Gold DVDs.
>
> While any product can fail to meet its predicted life expectancy, let's
> hope that these are better than most. So far, I have been pleased with
> the products from Mitsui and then MAM-A.
>
> Note: I do have a financial connection with MAM-A. I pay them money,
> through their Canadian distributor, for their discs (who sells them to me
> for less Canadian Dollars than the MAM-A Web site).  In Canada, talk to
> Bruce at Precision Sound in Toronto, and I enjoyed buying from
> www.am-dig.com when I was in the U.S.--just links for better pricing. For
> example, the archive gold at am-dig is $1.10 per disc in bulk.
>
> Cheers,
>
> Richard
>
> Tape Restoration Seminar:    MAY 9-12, 2006; details at Web site.
> Richard L. Hess                   email: [log in to unmask]
> Aurora, Ontario, Canada       (905) 713 6733     1-877-TAPE-FIX
> Detailed contact information: http://www.richardhess.com/tape/contact.htm



Marcos