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CD's that rots? Is it possible?
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sztorm75



Joined: 26 Sep 2008
Posts: 4000
Location: Warsaw, Poland

PostPosted: Wed Feb 18, 2009 3:16 am    Post subject: CD's that rots? Is it possible? Reply with quote

I know there was a topic I think, about that issue but I could not find it. I saw today that some of my old CD's started to have strange trails on the CD surface that looks like someone poured liquid inside the CD. Do you know how to prevent this anomaly? Rolling Eyes
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Mz412



Joined: 07 May 2007
Posts: 2724

PostPosted: Wed Feb 18, 2009 3:22 am    Post subject: Reply with quote

can you make some fotos?

disc rotting:

http://www.foetus.org/misc/rot.html
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seraphackh



Joined: 30 Dec 2008
Posts: 63
Location: Jena/Thuringia

PostPosted: Wed Feb 18, 2009 3:52 am    Post subject: Reply with quote

Heya, well according to an article in the Spiegel magazine, CDs are only a secure medium to store information for around 30 years. But they shouldn't rot under normal conditions.

http://www.spiegel.de/netzwelt/tech/0,1518,606766,00.html

The article is in German though.

BTW, hello to everyone, as I am new here! Wink
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Black_Fire



Joined: 20 Jan 2008
Posts: 3687
Location: Poland

PostPosted: Wed Feb 18, 2009 4:11 am    Post subject: Reply with quote

CD is hard to read after 15-30 years, no matter you keep it safe or not.

Tell me better how long taps stayin' alive?

And yes, only winyl is undead.
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sztorm75



Joined: 26 Sep 2008
Posts: 4000
Location: Warsaw, Poland

PostPosted: Wed Feb 18, 2009 4:17 am    Post subject: Reply with quote

It looks more like Stains than rot... or corrosion...



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Crepuscolar



Joined: 17 Apr 2007
Posts: 228

PostPosted: Wed Feb 18, 2009 4:59 am    Post subject: Reply with quote

How old is that? My oldest CD is from 1988, still plays fine!
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CR99



Joined: 26 May 2007
Posts: 9610
Location: M�lheim an der Ruhr/Germany

PostPosted: Wed Feb 18, 2009 5:05 am    Post subject: Reply with quote

seraphackh wrote:
BTW, hello to everyone, as I am new here! Wink


oh someone from stud town
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Endless Morbidity



Joined: 17 Oct 2007
Posts: 2108
Location: New York

PostPosted: Wed Feb 18, 2009 5:47 am    Post subject: Reply with quote

I have a lot of CD's with that stained look to them.

One really bizarre problem I've had with a lot of CD's, is what looks to be tiny little dots. Like thousands of them. The playback is unaffected though. My only guess is that is was caused by somewhat textured disc tray that left imprints on it.
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Demoniarch



Joined: 12 Mar 2008
Posts: 5762

PostPosted: Wed Feb 18, 2009 5:54 am    Post subject: Reply with quote

I've seen that cloudy look on the disc on many brand new albums, I always assumed it was from quick manufacturing and some residual leftover from the glue or whatever substance they use to press the cd layers together. Uneven layering or something along that effect.

Everything has always played fine.
I've also seen the spotted/dotted look once as well. The cd also played fine although it looked like shit. Very strange.


I always assumed for something to rot it would need exposure to moisture, like mold growing in the wall doesn't grow in dry places, it needs moisture and then all hell can break loose. Confused
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BreedingtheSpawn



Joined: 18 Oct 2007
Posts: 1305
Location: Cobra Island

PostPosted: Wed Feb 18, 2009 7:10 am    Post subject: Reply with quote

Demoniarch wrote:
I've seen that cloudy look on the disc on many brand new albums, I always assumed it was from quick manufacturing and some residual leftover from the glue or whatever substance they use to press the cd layers together. Uneven layering or something along that effect.

Everything has always played fine.
I've also seen the spotted/dotted look once as well. The cd also played fine although it looked like shit. Very strange.


I always assumed for something to rot it would need exposure to moisture, like mold growing in the wall doesn't grow in dry places, it needs moisture and then all hell can break loose. Confused


Yeah those dots on the playing side of the CD do look like shit. I had to replace many CD's with those dots on them.
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CR99



Joined: 26 May 2007
Posts: 9610
Location: M�lheim an der Ruhr/Germany

PostPosted: Wed Feb 18, 2009 7:11 am    Post subject: Reply with quote

It's mostly chemical effluvium from either the print on the top CD layer or the booklet. UK CDs (NIMBUS) had plenty of nasty printers, some even were originally used for cars. It can also be a reaction of the ingrediences of the CD itself.
Both cause these stripes or discoloring and lead mostly to the destruction of the important data layer of the CD.

Other problems like the many little holes in the data layer are caused by special mucus that likes to eat your CDs. Yes such stuff exist. There is so many stuff that exist, like tumors with brains, hair and teeth. You cant believe it
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Uncolored



Joined: 19 Sep 2008
Posts: 1314
Location: Cagliari/Italy

PostPosted: Wed Feb 18, 2009 7:17 am    Post subject: Reply with quote

CR99 wrote:

Other problems like the many little holes in the data layer are caused by special mucus that likes to eat your CDs. Yes such stuff exist.


yeah those kinda "mushrooms" will destroy your cd in very little time
a friend of mine got those in an ancient (the band) cd, I've read that this shit will contagious affect other cds too! so the best thing is to throw the sick cd in the garbage and clean the place.
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alkahest



Joined: 19 Jan 2009
Posts: 348

PostPosted: Wed Feb 18, 2009 8:07 am    Post subject: Reply with quote

this recently happened to my copy of Under a Funeral Moon and now it is unplayable Sad
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throneofmight



Joined: 25 Jul 2007
Posts: 2008
Location: Costa Rica

PostPosted: Wed Feb 18, 2009 8:23 am    Post subject: Reply with quote

only vinyl is real Very Happy
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Professor Black



Joined: 25 Mar 2008
Posts: 2116
Location: Evil Nation USA

PostPosted: Wed Feb 18, 2009 9:02 am    Post subject: Reply with quote

Well, CDs aren't made in a vacuum, so sure some moisture could be in there...
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