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What You Need To Know About Disc Rot
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DVD Profiler Unlimited RegistrantAscended_Saiyan
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Registered: March 13, 2007
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Disc rot occurs on 1% to 10% of DVDs.

If you have never seen "disc rot", here are pictures of it.

http://images.google.com/images?svnum=50&um=1&hl=en&safe=off&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&q=%22DVD+rot%22&btnG=Search+Images

Since HD DVDs are manufactured almost identically to DVD, they are susceptible to disc rot as well.  Actually, anything that DVDs are susceptible to, HD DVD would be as well.

Here's more information on "DISC ROT".

There have been claims that Blu-ray discs have all of a sudden had disc rot appear on "The Prestige" and "Stranger Than Fiction".  Disc rot is something one should notice right away.  The people that are claiming this (they all posted these pictures within hours of each other) said the disc played fine at first.  Now, Blu-ray's data layer is very close to the surface (that is why the hard coating was needed) so particles on the disc would certainly stop playback until the disc surface has been cleaned.

That being said, surely the disc would not have played in the BD (Blu-ray Disc) player at all.  Also, "disc rot" has never occurred on the inner ring of a disc because there is NO reflective layer.  The pictures of the "claimed" Blu-ray rot had spots (looks like someone had a toothbrush with some residue and pulled back the bristles to create a pattern) on the inner ring of the disc or photoshopped a pattern on the disc.  Apparently, they did not know where "disc rot" occurs on the disc or how it occurs.

Now, here is a picture these people are publishing claiming "disc rot" on Blu-ray discs.




This is what you call... Fear...Uncertainty...Doubt or FUD as it's more commonly known.  The only thing that combats that is knowledge.
To err is human...
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473 Blu-ray Titles
DVD Profiler Desktop and Mobile RegistrantStar ContributorSkywatcher
Registered: Feb. 7, 2002
Registered: March 13, 2007
Portugal Posts: 315
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I was under the belief that disc rot had affected only a few (already identified) production batches, mostly done at Technicolor UK (the duplication company, not related with the one from the color system), due to a problem with the glue (or adhesive, to be correct) used to unite the layers, that was a lower grade one (with impurities). I have not heard of the problem outside those well-known problem titles.
Where does the 1-10% come from?
Please correct me if I'm wrong.
With every passing hour our solar system comes forty-three thousand miles closer to globular cluster M13 in the constellation Hercules, and still there are some misfits who continue to insist that there is no such thing as progress.
DVD Profiler Desktop and Mobile RegistrantDr. Killpatient
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Registered: May 19, 2007
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The rot I've seen on old CD's looks more like a discoloration/distortion. I've never seen or heard of the rot showing up as specs.  I also don't believe that photo.
DVD Profiler Desktop and Mobile RegistrantBill MacNeill
Bill
Registered: March 13, 2007
United States Posts: 360
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Since 8ballMax missed this one and Bobb is not around...

Please we are all tired of this propaganda. STOP!!!!! I for one would not take your word or advice as you clearly are looking through blinders. You are either quite young and immature or just a complete moron if you think that what you quote carries any weight in the world of technology and the economics of what consumers will end up supporting in the long run. Twist your facts and believe what you want but please stop force feeding your views down our throats.

And of course

BLAH, BLAH, BLAH, BLAH
DVD Profiler Desktop and Mobile RegistrantStar Contributorcmaeditor
Registered: April 14, 2007
United States Posts: 433
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Quoting Ascended_Saiyan:
Quote:


There have been claims that Blu-ray discs have all of a sudden had disc rot appear on "The Prestige" and "Stranger Than Fiction".  Disc rot is something one should notice right away.  The people that are claiming this (they all posted these pictures within hours of each other) said the disc played fine at first.  Now, Blu-ray's data layer is very close to the surface (that is why the hard coating was needed) so particles on the disc would certainly stop playback until the disc surface has been cleaned.

That being said, surely the disc would not have played in the BD (Blu-ray Disc) player at all.  Also, "disc rot" has never occurred on the inner ring of a disc because there is NO reflective layer.  The pictures of the "claimed" Blu-ray rot had spots (looks like someone had a toothbrush with some residue and pulled back the bristles to create a pattern) on the inner ring of the disc or photoshopped a pattern on the disc.  Apparently, they did not know where "disc rot" occurs on the disc or how it occurs.

Now, here is a picture these people are publishing claiming "disc rot" on Blu-ray discs.



After doing a search and reading various forums, not just bluray.com's, the consensus is among those discussing the problem, is that it's a bubbling of the hard coat in the bottom surface of the disc. It's not a big deal yet, but if more discs show this problem, then it could just be a bad batch of the coating. It's also been reported on "The Departed" as well. I'm sure the studios will replace the discs without a hassle.

http://www.avsforum.com/avs-vb/showthread.php?t=857067
Chris
DVD Profiler Unlimited RegistrantAscended_Saiyan
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Registered: March 13, 2007
Posts: 1,127
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Quoting Skywatcher:
Quote:
I was under the belief that disc rot had affected only a few (already identified) production batches, mostly done at Technicolor UK (the duplication company, not related with the one from the color system), due to a problem with the glue (or adhesive, to be correct) used to unite the layers, that was a lower grade one (with impurities). I have not heard of the problem outside those well-known problem titles.
Where does the 1-10% come from?
Please correct me if I'm wrong.

It came from the link that says "more information on DISC ROT".  It's under "The Issues" section.
To err is human...
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473 Blu-ray Titles
DVD Profiler Unlimited RegistrantAscended_Saiyan
A Blu-ray crack fiend
Registered: March 13, 2007
Posts: 1,127
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Quoting cmaeditor:
Quote:
Quoting Ascended_Saiyan:
Quote:


There have been claims that Blu-ray discs have all of a sudden had disc rot appear on "The Prestige" and "Stranger Than Fiction".  Disc rot is something one should notice right away.  The people that are claiming this (they all posted these pictures within hours of each other) said the disc played fine at first.  Now, Blu-ray's data layer is very close to the surface (that is why the hard coating was needed) so particles on the disc would certainly stop playback until the disc surface has been cleaned.

That being said, surely the disc would not have played in the BD (Blu-ray Disc) player at all.  Also, "disc rot" has never occurred on the inner ring of a disc because there is NO reflective layer.  The pictures of the "claimed" Blu-ray rot had spots (looks like someone had a toothbrush with some residue and pulled back the bristles to create a pattern) on the inner ring of the disc or photoshopped a pattern on the disc.  Apparently, they did not know where "disc rot" occurs on the disc or how it occurs.

Now, here is a picture these people are publishing claiming "disc rot" on Blu-ray discs.


After doing a search and reading various forums, not just bluray.com's, the consensus is among those discussing the problem, is that it's a bubbling of the hard coat in the bottom surface of the disc. It's not a big deal yet, but if more discs show this problem, then it could just be a bad batch of the coating. It's also been reported on "The Departed" as well. I'm sure the studios will replace the discs without a hassle.

http://www.avsforum.com/avs-vb/showthread.php?t=857067


That's interesting.  But, looking at this picture again, these look like pigmented spots.  The hard-coating on a Blu-ray disc is clear.  Therefore, how can the clear hard-coating bubble into pigmented spots?
To err is human...
-----------
473 Blu-ray Titles
DVD Profiler Unlimited RegistrantStar ContributorKatatonia
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simple "bubbling" or not, that disc looks nasty.
Corey
DVD Profiler Unlimited RegistrantAscended_Saiyan
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Registered: March 13, 2007
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Quoting Katatonia:
Quote:
simple "bubbling" or not, that disc looks nasty.

Yep...looking like someone put make-up on the end of a toothbrush and flicked the bristles.
To err is human...
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473 Blu-ray Titles
DVD Profiler Desktop and Mobile RegistrantStar Contributorcmaeditor
Registered: April 14, 2007
United States Posts: 433
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Quoting Ascended_Saiyan:
Quote:
Quoting cmaeditor:
Quote:
Quoting Ascended_Saiyan:
Quote:


There have been claims that Blu-ray discs have all of a sudden had disc rot appear on "The Prestige" and "Stranger Than Fiction".  Disc rot is something one should notice right away.  The people that are claiming this (they all posted these pictures within hours of each other) said the disc played fine at first.  Now, Blu-ray's data layer is very close to the surface (that is why the hard coating was needed) so particles on the disc would certainly stop playback until the disc surface has been cleaned.

That being said, surely the disc would not have played in the BD (Blu-ray Disc) player at all.  Also, "disc rot" has never occurred on the inner ring of a disc because there is NO reflective layer.  The pictures of the "claimed" Blu-ray rot had spots (looks like someone had a toothbrush with some residue and pulled back the bristles to create a pattern) on the inner ring of the disc or photoshopped a pattern on the disc.  Apparently, they did not know where "disc rot" occurs on the disc or how it occurs.

Now, here is a picture these people are publishing claiming "disc rot" on Blu-ray discs.


After doing a search and reading various forums, not just bluray.com's, the consensus is among those discussing the problem, is that it's a bubbling of the hard coat in the bottom surface of the disc. It's not a big deal yet, but if more discs show this problem, then it could just be a bad batch of the coating. It's also been reported on "The Departed" as well. I'm sure the studios will replace the discs without a hassle.

http://www.avsforum.com/avs-vb/showthread.php?t=857067


That's interesting.  But, looking at this picture again, these look like pigmented spots.  The hard-coating on a Blu-ray disc is clear.  Therefore, how can the clear hard-coating bubble into pigmented spots?


I think it looks like colored spots because of the angle of the disc in the picture. If you read through the whole thread in the link I posted earlier, you can see other people's pictures of their discs that show the same problem. What has caused the coating to destabilize and produce these spots is hard to say. I am betting that this was a bad batch of the coating on these runs of BD discs.
My father was an organic chemist and for a long time worked in quality testing and developing coatings for the copper wire in coaxial cables. He would have to test each new batch of coating before it went onto the wire, to make sure it performed as well as the previous batch, even though the new batch was made exactly like the previous one. Even though they were made exactly the same, each batch performed differently in his tests. Some better that the last, and some worse.
Chris
 Last edited: by cmaeditor
DVD Profiler Desktop and Mobile RegistrantStar ContributorBad Father
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Registered: March 13, 2007
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Quoting Ascended_Saiyan:
Quote:
Quoting Katatonia:
Quote:
simple "bubbling" or not, that disc looks nasty.

Yep...looking like someone put make-up on the end of a toothbrush and flicked the bristles.


Blah, blah, blah, blah...
My WebGenDVD online Collection
DVD Profiler Unlimited RegistrantStar Contributorcvermeylen
Registered: March 13, 2007
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Any ever experienced disc rot first hand ?

I never had this problem with any CD or DVD. The only issue I suffered was a problem with the R2 release of the Rocky Collection. Apparently the glue for the digipack vaporised and left a film on all 5 discs. But I was able to remove all of it using a product to clean lenses.

So I'm not going to stop buying DVD's due to this info. 
View my collection at http://www.chriskepolis.be/home/dvd.htm

Chris
DVD Profiler Unlimited RegistrantStar ContributorKatatonia
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Quoting cvermeylen:
Quote:
Any ever experienced disc rot first hand ?


Nope on DVD, and I also still own some CD's that were manufactured back in 1983-1984 that look and play perfectly.
Corey
DVD Profiler Unlimited RegistrantRifter
Reg. Jan 27, 2002
Registered: March 13, 2007
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Quoting Katatonia:
Quote:
Quoting cvermeylen:
Quote:
Any ever experienced disc rot first hand ?


Nope on DVD, and I also still own some CD's that were manufactured back in 1983-1984 that look and play perfectly.


My parents also have a huge CD music collection that is as old as yours, and not one of them has this problem.
John

"Extremism in the defense of Liberty is no vice!" Senator Barry Goldwater, 1964
Make America Great Again!
DVD Profiler Unlimited RegistrantAscended_Saiyan
A Blu-ray crack fiend
Registered: March 13, 2007
Posts: 1,127
Posted:
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Quoting cmaeditor:
Quote:
Quoting Ascended_Saiyan:
Quote:
Quoting cmaeditor:
Quote:
Quoting Ascended_Saiyan:
Quote:


There have been claims that Blu-ray discs have all of a sudden had disc rot appear on "The Prestige" and "Stranger Than Fiction".  Disc rot is something one should notice right away.  The people that are claiming this (they all posted these pictures within hours of each other) said the disc played fine at first.  Now, Blu-ray's data layer is very close to the surface (that is why the hard coating was needed) so particles on the disc would certainly stop playback until the disc surface has been cleaned.

That being said, surely the disc would not have played in the BD (Blu-ray Disc) player at all.  Also, "disc rot" has never occurred on the inner ring of a disc because there is NO reflective layer.  The pictures of the "claimed" Blu-ray rot had spots (looks like someone had a toothbrush with some residue and pulled back the bristles to create a pattern) on the inner ring of the disc or photoshopped a pattern on the disc.  Apparently, they did not know where "disc rot" occurs on the disc or how it occurs.

Now, here is a picture these people are publishing claiming "disc rot" on Blu-ray discs.


After doing a search and reading various forums, not just bluray.com's, the consensus is among those discussing the problem, is that it's a bubbling of the hard coat in the bottom surface of the disc. It's not a big deal yet, but if more discs show this problem, then it could just be a bad batch of the coating. It's also been reported on "The Departed" as well. I'm sure the studios will replace the discs without a hassle.

http://www.avsforum.com/avs-vb/showthread.php?t=857067


That's interesting.  But, looking at this picture again, these look like pigmented spots.  The hard-coating on a Blu-ray disc is clear.  Therefore, how can the clear hard-coating bubble into pigmented spots?


I think it looks like colored spots because of the angle of the disc in the picture. If you read through the whole thread in the link I posted earlier, you can see other people's pictures of their discs that show the same problem. What has caused the coating to destabilize and produce these spots is hard to say. I am betting that this was a bad batch of the coating on these runs of BD discs.
My father was an organic chemist and for a long time worked in quality testing and developing coatings for the copper wire in coaxial cables. He would have to test each new batch of coating before it went onto the wire, to make sure it performed as well as the previous batch, even though the new batch was made exactly like the previous one. Even though they were made exactly the same, each batch performed differently in his tests. Some better that the last, and some worse.

That makes sense.
To err is human...
-----------
473 Blu-ray Titles
DVD Profiler Unlimited RegistrantAscended_Saiyan
A Blu-ray crack fiend
Registered: March 13, 2007
Posts: 1,127
Posted:
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Quoting cvermeylen:
Quote:
Any ever experienced disc rot first hand ?

I never had this problem with any CD or DVD. The only issue I suffered was a problem with the R2 release of the Rocky Collection. Apparently the glue for the digipack vaporised and left a film on all 5 discs. But I was able to remove all of it using a product to clean lenses.

So I'm not going to stop buying DVD's due to this info. 

I have close to 1700 DVD titles and 189 Blu-ray titles and never experienced it.
To err is human...
-----------
473 Blu-ray Titles
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