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Fw: [OM] CD ROMs and Archival Storage

Subject: Fw: [OM] CD ROMs and Archival Storage
From: "earthlink" <catsmaster@xxxxxxxxxxxxx>
Date: Tue, 21 Dec 1999 17:40:22 -0800
----- Original Message -----
From: "earthlink" <catsmaster@xxxxxxxxxxxxx>
To: "Motor Sport Visions Photography" <msvphoto@xxxxxxxxxxx>
Sent: Tuesday, December 21, 1999 4:58 PM
Subject: Re: [OM] CD ROMs and Archival Storage


> Mike wrote:
> Other manufacturing defects in the earlier years of this technology
include
> off-center spindle holes and warpage (the later being more of an issue
with
> 12" laser discs).
>
> There is another manufacturing defect that I see every now and then. I
call
> them dimples, but they may have an official name in the manufacturing
> circles. These "dimples" are tiny little warpages in a circular pattern. I
> have never seen more than one on a disc, but I have had these "dimple"
discs
> sent to me for repair, thinking maybe it was a scratch. But after all
> scratches are removed the program will still crash if CD-ROM, or on music
> CDs the music will skip, repeat or cause the player to do something it
> shouldn't. It took me a while to recognise the dimple problem, but once I
> knew what I was looking for they became easy to spot. Some are not so
> noticable, and a loupe would probably be handy here. There is no cure for
> these discs, just like label side damage is not curable, because there is
an
> actual distortion in the plastic that causes the laser to either diffract
or
> causes it to go to another track which confuses the player or drive.
> I developed my own process 2 years back of removing scratches from the
"play
> side" of any 5" disc, and the technology can be applied to the 7" karaoke
> discs as well, but I am not set up for these. I now have three machines
that
> are considered a "polish" process, but more aggressive. I actually remove
as
> much polycarbonate as necessary to get down to the level of the deepest
> scratch, usually several microns, but I can go furthur of course. The
finish
> upon completion is not factory perfect, but if you do not look real close,
> it would seem like a factory finish. My process applies a lot of pressure,
> and friction to the disc, so there really is no way you are going to be
able
> to get a badly scratched disc back to close to factory condition with just
a
> little "rag and polish" kit that is now commonly sold these days, without
> spending many hours on it. My machines revolve at 1100 RPM, and make quick
> work of the polish process.
> I thought I really had a "killer" business idea with my process, and tried
> to market my services for about a year only to see new CD prices go way
> down, and used CDs down too, making my idea basically unmarketable,
however
> DVDs are still possible, unless the prices drop on these too. Anyway
bottom
> line is, I still have the equipment, and I still do some repair, usually
300
> or so discs at a time for established customers, but I am not trying to
drum
> up business anymore. I simply have better things to do than to revive a
dead
> horse. BUT anyone on this list who needs a disc repaired, I will do it for
> free as long as postage is paid. If someone needs a bunch of them done, I
> won't do it free but the price will be reasonable.
>
> Catmaster CDR(Certified Disc Repairman)
>


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