| Author |
Message |
Jimmy
Guest
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 Posted:
Tue Jan 04, 2005 6:29 am Post subject:
Re: Destroying a CD - microwave it? |
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Steve wrote:
| Quote: | "Clark W. Griswold, Jr." <spamtrap100@comcast.net> wrote:
Since the recording takes place between the two layers, what purpose
do the bottom grooves serve?
What grooves are you talking about? DVD and CDR blanks are smooth on
the bottom external surface. On the top as well, for that matter.
Oops, you're right, I'd been seeing grooves when there weren't any
there. This is what happens when you get old. Sigh.
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Are you sure you weren't trying to play those old 45s ;) |
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Clark W. Griswold, Jr.
Guest
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| Posted:
Tue Jan 04, 2005 6:34 am Post subject:
Re: Destroying a CD - microwave it? |
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Steve <fjqi@hdsx.inv> wrote:
| Quote: | Oops, you're right, I'd been seeing grooves when there weren't any
there. This is what happens when you get old. Sigh.
|
Actually, Verbatim sells CDR blanks that do gave grooves in the top. They look
like 45s ("What are 45s, daddy?") - but are purely decorative. :) |
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Erik
Guest
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| Posted:
Tue Jan 04, 2005 8:16 am Post subject:
Re: Destroying a CD - microwave it? |
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In article <ddbjt09m73rl7g6cpb2hsu8v3qq97d37po@4ax.com>,
Dave Balcom <balcy24@charter.net> wrote:
| Quote: | On Mon, 03 Jan 2005 08:08:05 -0800, Steve <fjqi@hdsx.inv> wrote:
}According to an article in CNET, "The best way to destroy CD-Rs is to
}microwave them on high for five seconds."
I thought microwaves work on the moisture content of the food you are
cooking? Maybe the dye is liquid enough to create heat...
A good pair of heavy scissors works. I cut my old discs into pieces...
Later,
Dave
|
I have a pair of 10" sheet metal snips (Diamalloy DS-10. They look like
a pair of large scissors with short 2 1/2" blades). I keep them in my
desk just for cutting up CD's, credit cards, cardboard and the like.
They aren't expensive, and make cutting up stuff like that a breeze...
actually come in handy quite often, and take up little space.
Erik |
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The Real Bev
Guest
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| Posted:
Tue Jan 04, 2005 9:16 am Post subject:
Re: Destroying a CD - microwave it? |
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Michael Black wrote:
| Quote: |
Steve (fjqi@hdsx.inv) writes:
"Dr. Rastis Fafoofnik" <Fafoofnik@fafoofnik.org> wrote:
Deeply scratching the TOP side will render them useless. As long as you see
shiny bits of foil coming up, it's done.
I've never quite understood this - you mean the side with the label?
Isn't the recording done on the bottom (blank) side?
The foil is closer to the surface on the label side. It's easier to
actually damage the foil by going at it from the label side.
|
Moreover, I read recently that adding those pretty labels that you went
to so much work to make actually damages the CD/DVD.
--
Cheers, Bev
================================================================
I can picture a world without war, without hate. I can picture
us attacking that world, because they'd never expect it. |
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Steve
Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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Stan Brown <the_stan_brown@fastmail.fm> wrote:
| Quote: | Ok, thanks. I've been mostly snapping them in half if I wanna destroy
them...
This is my technique too, though I was surprised at how sturdy they
are.
|
Yeah, you really gotta bend those suckers - and be careful with those
little pieces that fly off at warp speed. I usually put it in the
middle of a magazine, then break it. |
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Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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On Tue, 04 Jan 2005 04:58:59 GMT, Bob Ward <bobward@verizon.net> wrote:
| Quote: | Since the recording takes place between the two layers, what purpose
do the bottom grooves serve?
There are no bottom grooves. It is smooth on both top and bottom.
The dye in between changes colors, but there are no grooves.
|
*Something* has to tell the head how to position itself, and its not a
preprogrammed absolute positioning gizmo. There are grooves in the
polycarbonate disk that are detected and used constantly to properly
position the head over the spiral track on a CD/DVD. But you're right,
the grooves aren't on the top or bottom, they're where the reflective
layer is. With a CD, that's pretty much the top.
--
N |
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Erik
Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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In article <dpdkt0pbi3s9b2984v3d2ht72erdvef8ad@4ax.com>,
Steve <fjqi@hdsx.inv> wrote:
| Quote: | Stan Brown <the_stan_brown@fastmail.fm> wrote:
Ok, thanks. I've been mostly snapping them in half if I wanna destroy
them...
This is my technique too, though I was surprised at how sturdy they
are.
Yeah, you really gotta bend those suckers - and be careful with those
little pieces that fly off at warp speed. I usually put it in the
middle of a magazine, then break it.
|
I like the magazine idea very much! On occasion I have need to bust them
when away from my desk... like you say, some send plastic shards and
foil flying everywhere. I bet it wouldn't be hard to get cut breaking
them...
Thanks for the great idea!
Erik |
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Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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On Mon, 03 Jan 2005 20:16:08 -0800, The Real Bev
<bashley@myrealbox.com> wrote:
| Quote: | I've never quite understood this - you mean the side with the label?
Isn't the recording done on the bottom (blank) side?
The foil is closer to the surface on the label side. It's easier to
actually damage the foil by going at it from the label side.
|
*Way* closer. With CDs that don't have optional, additional (very
thin) layers, the foil is the thickness of a coating of lacquer below
the top. The laser goes through pretty much the entire thickness of the
CD to get to the recording layer.
| Quote: | Moreover, I read recently that adding those pretty labels that you went
to so much work to make actually damages the CD/DVD.
|
I don't think so with DVD. With CD, yes, it does happen, but my
understanding is that some labels are safe. Couldn't tell you which
ones, and I don't think the problem is completely understood, so labels
on CDs are "out" for anything you want to be long lasting. For me,
anyway.
--
N |
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Steve
Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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"Jimmy" <jimmycliff@spamex.com> wrote:
| Quote: | Since the recording takes place between the two layers, what purpose
do the bottom grooves serve?
What grooves are you talking about? DVD and CDR blanks are smooth on
the bottom external surface. On the top as well, for that matter.
Oops, you're right, I'd been seeing grooves when there weren't any
there. This is what happens when you get old. Sigh.
Are you sure you weren't trying to play those old 45s ;)
|
Don't ask. Actually, it's relaxing listening to those 45s with my
coffee cup in the computer's thingie holder. :) |
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Scott en Aztlán
Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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On Mon, 03 Jan 2005 08:08:05 -0800, Steve <fjqi@hdsx.inv> wrote:
| Quote: | According to an article in CNET, "The best way to destroy CD-Rs is to
microwave them on high for five seconds."
|
The gummint uses belt sanders.
--
Friends don't let friends shop at Best Buy (except to buy loss leaders for resale on eBay).
(See http://tinyurl.com/6efhd) |
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Bob Ward
Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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On Mon, 03 Jan 2005 20:16:08 -0800, The Real Bev
<bashley@myrealbox.com> wrote:
| Quote: | Michael Black wrote:
Steve (fjqi@hdsx.inv) writes:
"Dr. Rastis Fafoofnik" <Fafoofnik@fafoofnik.org> wrote:
Deeply scratching the TOP side will render them useless. As long as you see
shiny bits of foil coming up, it's done.
I've never quite understood this - you mean the side with the label?
Isn't the recording done on the bottom (blank) side?
The foil is closer to the surface on the label side. It's easier to
actually damage the foil by going at it from the label side.
Moreover, I read recently that adding those pretty labels that you went
to so much work to make actually damages the CD/DVD.
|
That's why my next printer is going to be a cheap ($89 at Sam's Club)
Epson that can print on CD and DVD media AND has individual ink tanks. |
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Brendan R. Wehrung
Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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Steve (fjqi@hdsx.inv) writes:
Office supply stores advertise shredders which will chew up CDs. That has
to be safer than letting plastic fumes loose in your home.
Brendan
-- |
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Michael Black
Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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Steve (fjqi@hdsx.inv) writes:
| Quote: | Andy Hill <andy_hill@hp.com> wrote:
On CD-Rs, the dye layer (the part that gets "recorded") is embedded in the CD,
but is actually much closer to the label side than to the substrate (the
underneath side). If you can score down through the thin protective layer (the
very "top" of the CD) down to the reflective layer (the "foil" Rastis refers
to), you'll do a pretty good job of trashing the CD. Good enough to stop
your typical dumpster diver from grabbing anything off the CD, anywho.
Ok, thanks. I've been mostly snapping them in half if I wanna destroy
them...
And realistically, that is good enough for all but the most paranoid. |
Especially if one was to keep the halves separate when tossing them out,
like putting each half out on separate garbage days, or leaving one half
in one public trash can and othe other half in another.
Like anything, the effort someone will make to recover data goes up only
as the value of that data goes up. So if the cdrom is marked as being from
someone well know, there is much more incentive to recover that data. But
they have to way that against the effort.
Someone finding an intact cdrom may try it out for curiosity sake. If it's
broken in half, that lowers the number who will make the effort, considerably.
if they can't find the other half, few will bother, and so on.
Micahel |
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RipCurl
Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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Steve wrote:
actually you only need 2 seconds. its pretty ( like when you put foil in
the micro. same thing ).
It cracks the "silver" lining that you see, rendering it useless |
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RipCurl
Guest
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| Posted:
Tue Jan 04, 2005 9:20 am Post subject:
Re: Destroying a CD - microwave it? |
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Dr. Rastis Fafoofnik wrote:
| Quote: | "Steve" <fjqi@hdsx.inv> wrote in message
news:h8rit09qpvgeur2thoiigjpmtqc8ivac0f@4ax.com...
According to an article in CNET, "The best way to destroy CD-Rs is to
microwave them on high for five seconds."
Has anyone tried this? Does it work? Any unpleasant side effects?
http://news.com.com/Who+says+safe+computing+must+remain+a+pipe+dream/2010-10
71_3-5482340.html
Deeply scratching the TOP side will render them useless. As long as you see
shiny bits of foil coming up, it's done.
|
actually, we've been able to recover data from a deeply scratched cd.
the only way to destroy it is make sure the silver is so damaged, it
can't be read or
bend or break it. |
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