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It is currently 26 Apr 2024, 20:18
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nextwednesday
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Post subject: Re: DADC USA Rot Plot Posted: 18 Feb 2021, 15:34 |
Serious fan |
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Joined: 10 May 2007, 17:00 Posts: 217 Location: United Kingdom Has thanked: 11 times Been thanked: 12 times
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confederate wrote: cplusplus wrote: Indeed. If DADC USA was pressing discs in a non-cleanroom, then PDO UK was pressing discs in the parking lot. Even their CDs were complete garbage. And I am unaware of any other plant in the world producing such faulty CDs. I can live with a few speckles here and there as long as the sound is fine but I have seen many PDO UK discs with distorted Audio. Confederate is right. By any properly normalised measure, PDO is by far the worst plant for LDs. They were also responsible for a high proportion of CDs with disc rot, but the bad proportion is much lower than it is for their LDs. The main mechanism for the deterioration appears to have been that because the information is stored so close to the top (label) side of CDs, the metals often reacted with chemicals in the paper booklets inside the jewel case. Storing the disc "upside down" (i.e. with the label side hidden) in the jewel case solved the problem. I became aware of this in about 1994 and since then stored my PDO CDs that way round and there has been no further deterioration. I have direct comparisons of discs made just months apart in the same factory (for the same publisher too) that clearly show the effect of which way round they were stored. Every today if the cd is playable (many are) it's worth flipping it over in the case to prevent it getting worse. My other observation is that a media player will often rip a rotted cd just fine even if a cd player produces garbage. This goes for 5-inch cd-videos too. Just yesterday, I played a 5-inch CD-V made by PDO ( Was (Not Was): Anything Can Happen (1988) [080 454-2]) and it's perfect. The seller that I got it from had kept a layer of plastic between the disc and paper booklet, saving the disc. This rot mechanism is completely different from LD rot, so it speaks rather badly for the factory that they suffered from both! The other thing to note is that a few disc publishers did actually try to do the right thing and had a scheme to replace rotted cds for free where possible. I had maybe a 8-10 replaced and the scheme ran for maybe ten years. No longer, alas.
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admin
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Post subject: Re: DADC USA Rot Plot Posted: 28 Dec 2021, 08:05 |
Site Admin |
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Joined: 07 Aug 2002, 23:37 Posts: 4551 Location: Tokyo Has thanked: 295 times Been thanked: 1147 times
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lonerangerface wrote: The Super-Vips. Hardly a rotter.
LDVS-001715-A-A3 LDVS-001715-B-B2 LDVS-001716-A-A1 LDDN-000001-Z-Z163 That's because you are still in the low master serial numbers (1715~6). It starts getting really bad from 2000~2500. Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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monstersenco
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Post subject: Re: DADC USA Rot Plot Posted: 20 Mar 2022, 17:22 |
Knows how to post |
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Joined: 17 Mar 2022, 15:47 Posts: 9 Location: Netherlands Has thanked: 0 time Been thanked: 0 time
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sonicboom wrote: cplusplus wrote: I made this DADC USA rot plot from the mint markings that have been added to the database so far. This is awesome, thank you for going to all the trouble and digging through the data. I hate DADC US. Even non-rotters don't look as good other plants IMO. I would be interested to find out why. DADC Austria, however, makes a great product on par or better than other plants. And DADC Japan too. I have several heard stories of people who said that DADC Austria and DADC Japan are much better than DADC USA.
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rwinger24
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Post subject: Re: DADC USA Rot Plot Posted: 04 Feb 2023, 05:53 |
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Joined: 03 Feb 2023, 19:00 Posts: 2 Location: United States Has thanked: 0 time Been thanked: 0 time
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lonerangerface wrote: My SONY DADC copy of Ham on Wry: The Porky Pig Laser Collection has laser rot entirely on side 1 but not on side 2. Mint Marks: LDVS-001202-A-A2 LDVS-001202-B-B2 Same with my copy of "Looney Tunes After Dark". Rot on Side 1 in terms of digital audio, small specks. Side 2 is fine up until Chapter 6 and 7 with garbled audio and small video artifacts. Mint Marks: LDVS-001203-A-A10 LDVS-001203-B-B6
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fullspectrum2000
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Post subject: Re: DADC USA Rot Plot Posted: 17 Feb 2023, 11:51 |
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Joined: 17 Feb 2023, 11:09 Posts: 9 Location: Australia Has thanked: 4 times Been thanked: 0 time
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darthmaul26 wrote: Just rewatched Bad Boys and Side 3 is worse than I remembered. The first half of the side was peppered with speckles but the second half was mostly spotless. Could have sworn it wasn't like that. Huh. Though sides 1 & 2 are still mild except the very beginning of 1.
Maybe I didn't have an eye for rot previously, as it was the first film I played when I got my new player about 2 months ago. Lament. One of my fave LDs has just started to display rot in the final 5 minutes. Is this is an omen of LD's future? Will all our discs die in the next few years? Roger Avery reckons the entire LD collection he purchased from the video store he worked at with Tarantino is virtually junk now. https://videoarchivespodcast.comI guess Avery lives in SoCal/Hollywood? Low humidity? I live in a low humidity area too. and I dunno, I have tons of discs that AFAIK/As recently as I last viewed work perfectly. Avery reckons most of his are rotted.
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