BluRay discs developing 'BluRot'..?
Posted on 17/06/07 17:15 by Mike Kidd                             
BluRay discs developing 'BluRot'..?

Perhaps it is time to start picking up on a developing thread over on AVS forums, where several members are reporting the apparent premature decay of Blu-ray BD-ROM movie titles.

Reading these reports, it is not clear whether this is a widespread phenomenon, since many other members have BR discs that are showing no signs of decay. However there are several pretty convincing photographs of what appears to be a discolouration or spotting of the disc surface below the outer protective layer. As of yesterday, there seem to be two particular titles affected, but some others as well: Prestige (12 reports); Stranger than Fiction (2 reports); Departed (1 report); Gone in 60 Seconds (1 report). In at least three cases this has resulted in the disc failing to play.

Thankfully, it looks like those unlucky enough to have this problem are getting their BR discs exchanged by Amazon, with Buena Vista Home Entertainment (BVHE) writing separately to ask that the damaged discs be sent to them for analysis.

Of course there is a lot of speculation about what might have caused this (poor choice of plastic layers, poor quality control at manufacture, domestic atmospheric conditions), or whether this series of reports even consitutes a reliable body of evidence that something systematic is wrong. Twelve examples of the same title exhibiting this problem would seem to be strongly suggestive, but remember that verbal reports without photographs are less than desirable, and even the pictures themselves can be manufactured. One member observes that a particular photograph looks as if powdered cinnamon has been sprinkled on it.

Probably the only reliable indication of whether something is really wrong, would be the product recall and replacement program by BVHE. Whilst it could also be seen as a disappointment for Sony (co-developers of the BluRay technology) in what has to be a pretty bad month for publicity, it is quite possible that these are just manufacturing issues and not a flaw in the overall design of BluRay.

As usual we will have to just wait and see, but perhaps CD Freaks members would like to check their BR titles for similar spotting or other types of decay or non-playability.

You can report your findings in this thread on CD Freaks...

 

Reactions
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By ivid, Sunday 17 June 2007 19:40
Interesting. Apparently blu-ray productions issues prevented the Matrix and Batman Begins blu-ray titles from being release recently. I wonder if its for related reasons. However, even though I am a HD DVD supporter I do believe this is a hoax or false alarm. Since it was specific to certain titles (so far) it seems likely that it is a problem with a specific production run.
By deckard68 (guest), Sunday 17 June 2007 20:05
Salient point from the thread is that since the specs are also over the hub, it is something wrong with the hard coat, and not something wrong with the media layers.
By agentk7, Sunday 17 June 2007 20:55
agentk7Keep in mind that hard coat is REQUIRED for Blu-Ray discs because the data is so close to the surface. I'm surprised this hasn't happened long before now. HD-DVD on the other hand has the same physical construction characteristics as regular DVDs and hard coat is unnecessary.
By N4CR (guest), Monday 18 June 2007 05:38
And how many countless CD's have I seen like this. Do we see similar news items and threads on it when we have such little amounts... think outside the square guys. Seems like there is a massive marketing effort against Sony lately with the PS3 and all... lol. Until I see consistent failures and massive problems I'd be erring on the side of it being a small minor production issue.
By Lord KiRon, Monday 18 June 2007 08:53
On the other hand the BD coating layer is 0.1mm unlike DVD and HD DVD's that 0.6mm ...
By old3eyes, Monday 18 June 2007 11:01
"Posted by N4CR (guest) on Monday 18 June 2007 05:38 And how many countless CD's have I seen like this. Do we see similar news items and threads on it when we have such little amounts..." I have been buying CDs for 20 years and have never seen one with "Rot
By DukeNukem, Monday 18 June 2007 14:47
DukeNukemThis is just one more nail in Blu-ray's coffin. My mind was set to wait until the smoke cleared a bit before I made the jump from DVD to high-definition discs. However, Blu-ray keeps stumbling and on Saturday my wife asked what I wanted for Father's Day. I said I wanted "Planet Earth" on HD DVD. Now, I don't have an HD DVD player or a plasma/lcd screen but I will in the next few months and I didn't see the point in buying it on DVD. From what I hear this HAS to be seen in hi-def and I've now made the decision to put my substantial purchasing muscle behind HD DVD. Smilie
By dentman42, Monday 18 June 2007 19:02
CD rot WAS big news when it was first discovered about 20 years ago. We just didn't have forums like CD Freaks to post on. I've had a few CDs and a few LDs with rot problems, but I have a friend who lost several titles from a particular artist that were all pressed at Discovery Systems.
By blahblahblah (guest), Monday 18 June 2007 21:44
Since the label of a CD is very thin I've seen this happen on abused CDs. The label gets damaged, air gets to the aluminum, and it turns black over a period of several years. Used CD stores sometimes miss this. A thin coating of nail polish over the damaged pars of a CD stops this.
By Dolphinius_Rex, Tuesday 19 June 2007 18:02
Dolphinius_RexThis is nothing new unfortunately. I've seen it with CDs, DVDs and I expect that I'll see it in my own Blu-Ray media eventually also. HD DVD is also susceptible. It's an optical media thing.
By heystoopid, Wednesday 20 June 2007 22:38
Say didn't I see some where , a mention that Blu-Ray media actually uses a layer of ultra thin silver rather than aluminum for it's reflective surface , and we all know what happens to silver in the presence of a common car exhaust pollutant called hydrogen sulphide! Rotten eggs anyone? cool
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