Saturday, July 29, 2006
Member since:
July 2006
July 2006
I have DVD’s (pressed), although they play correctly, they have a large stain on the reading surface.
It looks like a coffee stain. According to sources on the web this is due to DVD-ROT and the
stain means that corrosion has started and the DVD will become unreadable in the future.
But according to the shops were I bought the DVD’s nothing is wrong. About 1/3 of my DVD’s
has such coffee stains, they can't be all defective. What is going on ? Please some help
I someone has knowledge of DVD discs give me your e-mail adress by posting it on forum or contact me on jonas10.redant@belgacom.net
It looks like a coffee stain. According to sources on the web this is due to DVD-ROT and the
stain means that corrosion has started and the DVD will become unreadable in the future.
But according to the shops were I bought the DVD’s nothing is wrong. About 1/3 of my DVD’s
has such coffee stains, they can't be all defective. What is going on ? Please some help
I someone has knowledge of DVD discs give me your e-mail adress by posting it on forum or contact me on jonas10.redant@belgacom.net
Sunday, July 30, 2006
Member since:
March 2002
March 2002
"I have DVD’s (pressed)" --jonasredant
First, what do you mean by "pressed"?
Second, exactly where are the "stains"? How big are they? Are they under the surface of the protective layer of the discs or on the surface of the protective layer?
"1/3" of your DVDs means how many?
Did you buy all of these affected discs in the U.S. from the same store?
Did this happen all at once to your discs or over a period of time?
Is it a particular brand of DVD or a specific studio involved? Do you see any kind of pattern in the affected discs?
You showed these discs to a store, and they said nothing was wrong? Obviously, if you can see the stains and they weren't there before, something has gone wrong. Can you trust the store? Is it a chain store or an independent store? Is it possible the store is selling substandard, even pirated, merchandise?
Disc rot was reported in the early days of CDs, largely due to poor manufacturing. Moisture could seep in between the clear protective outer layer and the metal foil containing the data pits because the seal was not properly made. However, such "disc rot" was very uncommon, and it was generally only reported happening in moist, humid climates. I have had thousands of CDs over the years and never once experienced the problem.
As far as DVD disc rot is concerned, that, too, is possible but not too likely from major manufacturers and major studios. See if you can answer some of the above questions for us.
John
First, what do you mean by "pressed"?
Second, exactly where are the "stains"? How big are they? Are they under the surface of the protective layer of the discs or on the surface of the protective layer?
"1/3" of your DVDs means how many?
Did you buy all of these affected discs in the U.S. from the same store?
Did this happen all at once to your discs or over a period of time?
Is it a particular brand of DVD or a specific studio involved? Do you see any kind of pattern in the affected discs?
You showed these discs to a store, and they said nothing was wrong? Obviously, if you can see the stains and they weren't there before, something has gone wrong. Can you trust the store? Is it a chain store or an independent store? Is it possible the store is selling substandard, even pirated, merchandise?
Disc rot was reported in the early days of CDs, largely due to poor manufacturing. Moisture could seep in between the clear protective outer layer and the metal foil containing the data pits because the seal was not properly made. However, such "disc rot" was very uncommon, and it was generally only reported happening in moist, humid climates. I have had thousands of CDs over the years and never once experienced the problem.
As far as DVD disc rot is concerned, that, too, is possible but not too likely from major manufacturers and major studios. See if you can answer some of the above questions for us.
John
Sunday, July 30, 2006
Member since:
June 2006
June 2006
John, others...
Several years ago (2001 or 2002), the alt.video.dvd newsgroup contained several reports of "DVD rot" from discs manufactured by Warner [as you probably know, Warner has a division that actually produces discs]. The posters were reputable "home theater" enthusiats, and statements were made that discs which played perfectly when purchased years earlier, were now experiencing "drop-outs" and other visable errors.
One of my favorite concert DVDs - "Mirrorball" by Sarah McLachlan - for years played perfectly - until last year. For some unknown reason, when I get to the 5th song (and ONLY during this one song), the image and audio suffer drop-out glitches [similar to those "smeared" compressed HD cable transmissions], and this is a bummer since it affects even the audio too. And yes, the disc is clean with no visible signs of why the glitch happens only during this song, and I've tried playing the disc on three DVD players [2-home and 1-work], and it's always a problem.
I'm don't mean to slight Warner, as they have produced millions of quality discs - my MATRIX DVD from 1999 still plays perfectly (and this was a title that 'bugged' various DVD players for compatibility at the time) - but more than a few people have stated problems over the years with "dvd-type rot" from Warner discs.
-Love Hendrix!
Several years ago (2001 or 2002), the alt.video.dvd newsgroup contained several reports of "DVD rot" from discs manufactured by Warner [as you probably know, Warner has a division that actually produces discs]. The posters were reputable "home theater" enthusiats, and statements were made that discs which played perfectly when purchased years earlier, were now experiencing "drop-outs" and other visable errors.
One of my favorite concert DVDs - "Mirrorball" by Sarah McLachlan - for years played perfectly - until last year. For some unknown reason, when I get to the 5th song (and ONLY during this one song), the image and audio suffer drop-out glitches [similar to those "smeared" compressed HD cable transmissions], and this is a bummer since it affects even the audio too. And yes, the disc is clean with no visible signs of why the glitch happens only during this song, and I've tried playing the disc on three DVD players [2-home and 1-work], and it's always a problem.
I'm don't mean to slight Warner, as they have produced millions of quality discs - my MATRIX DVD from 1999 still plays perfectly (and this was a title that 'bugged' various DVD players for compatibility at the time) - but more than a few people have stated problems over the years with "dvd-type rot" from Warner discs.
-Love Hendrix!
Sunday, July 30, 2006
Member since:
March 2002
March 2002
As I said, anything is possible, and individual production runs may include faulty pressings. However, jonasredant is talking about 1/3 of his collection going bad and showing stains like coffee stains. That's pretty unusual, unless they're all from the same dubious manufacturer or the same pirate duplicator.
John
John
Sunday, July 30, 2006
Member since:
December 2003
December 2003
jonasredant,
Not that I'm an expert or anything, but, have you considered that your discs could be suffering damage as a result of the location you've got them in (e.g. too close to a heater, or near or in an environment that has a significant concentration of chemicals in the air), or possibly the climate you're living in (humidity, extreme heat or sun exposure)? 1/3 of your collection having similar defects, leads me to believe that this problem isn't just coincidence, but lies in one of the two (or both) issues I mentioned above. A third possibility is outside individuals. Do you live with anyone that could have been doing something that made the stains? Could they have spilled something on them, and then tried to cover their tracks? I think it could be reasonably assumed that if 1/3 of your collection was due to manufacturer defect, this "DVD rot" business would be a more prevelant issue, and a lot more people would be speaking out about it.
I agree with John. Anything is possible, but, this just smacks of either foul play (no pun intended) an accident someone didn't want to have to pay for, or you've got your collection near something that's causing these problems.
I hope you figure it out,
- Josh
Not that I'm an expert or anything, but, have you considered that your discs could be suffering damage as a result of the location you've got them in (e.g. too close to a heater, or near or in an environment that has a significant concentration of chemicals in the air), or possibly the climate you're living in (humidity, extreme heat or sun exposure)? 1/3 of your collection having similar defects, leads me to believe that this problem isn't just coincidence, but lies in one of the two (or both) issues I mentioned above. A third possibility is outside individuals. Do you live with anyone that could have been doing something that made the stains? Could they have spilled something on them, and then tried to cover their tracks? I think it could be reasonably assumed that if 1/3 of your collection was due to manufacturer defect, this "DVD rot" business would be a more prevelant issue, and a lot more people would be speaking out about it.
I agree with John. Anything is possible, but, this just smacks of either foul play (no pun intended) an accident someone didn't want to have to pay for, or you've got your collection near something that's causing these problems.
I hope you figure it out,
- Josh
