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Laser Rot

Well, Laser Rot is a problem important enough to deserve a dedicated page.

Metal Layer Oxydation (also called laser rot) is the plague of LDs. Impossible to forecast, useless to fight, it can happen anytime during the lifetime of a disc. Hopefully not all LD titles manufactured are suffering from this disease and some Factories are more famous than others on this issue (SONY DADC being #1).

Current Status 7649 reports on 4358 titles representing 0.98% of total collections
Top 100 LDs
(realtime)
  1. Eraser [14202]  (7936)
  2. Air Force One: Special Edition [71886]  (6944)
  3. Starship Troopers [71716]  (4324)
  4. Jumanji [11746]  (3240)
  5. Ace Ventura: When Nature Calls [23500]  (3115)
  6. Net, The [11616]  (2975)
  7. Cable Guy, The [82426]  (2856)
  8. Copycat [14168]  (2754)
  9. Men in Black [82656]  (2695)
  10. Contact: Special Edition [15041]  (2555)
  11. Under Siege 2: Dark Territory [13665]  (2291)
  12. Heavy Metal [74656]  (2077)
  13. Lost Highway [ID3946PG]  (1764)
  14. Shawshank Redemption, The [74596]  (1690)
  15. Fugitive, The [21000]  (1430)
  16. Professional, The [74746]  (1416)
  17. Beauty and the Beast: Work in Progress [1591 CS]  (1378)
  18. Striptease [84976]  (1368)
  19. Dante's Peak [43311]  (1248)
  20. Fan, The [82476]  (1218)
  21. Fifth Element, The [82406]  (1104)
  22. Fargo [800638693-1]  (946)
  23. Game, The [ID4260PG]  (874)
  24. Demolition Man [12985]  (861)
  25. Volcano [0603985]  (756)
  26. Gattaca [82646]  (648)
  27. Boot, Das (The Boat) [99916]  (612)
  28. Batman Returns [15000]  (595)
  29. Bad Boys [10716]  (561)
  30. Fair Game [14072]  (528)
  31. Willow [79356]  (525)
  32. First Knight [71176]  (504)
  33. Johnny Mnemonic [73476]  (486)
  34. Multiplicity [82446]  (465)
  35. The Beatles: Let It Be [4508-80]  (442)
  36. Dolores Claiborne [59906]  (434)
  37. Mute Witness [41176]  (429)
  38. Ace Ventura: Pet Detective [23000]  (390)
  39. Barb Wire [800639927-1]  (377)
  40. Batman & Robin [16500]  (364)
  41. I Know What You Did Last Summer: Special Edition [23926]  (364)
  42. Tin Cup [14318]  (364)
  43. Star Wars Trilogy: Definitive Collection [0693-84]  (360)
  44. I Come in Peace [LVD9603]  (336)
  45. Hunchback of Notre Dame, The [7955 AS]  (312)
  46. Fire Down Below [14914]  (312)
  47. Grumpier Old Men [14191]  (300)
  48. Anaconda [81756]  (286)
  49. WarGames [4714-80]  (270)
  50. Abyss, The: Special Edition [1988-85]  (242)
  51. Devil's Own, The [82466]  (240)
  52. Hamlet [94996]  (231)
  53. Blade Runner: Special Edition [CC1120L]  (220)
  54. Craft, The [82416]  (220)
  55. Aliens: Special Widescreen Collector's Edition [1504-85]  (216)
  56. Donnie Brasco [82516]  (210)
  57. To Die For [73436]  (209)
  58. Double Team [83236]  (207)
  59. Maximum Risk [27416]  (200)
  60. Blade Runner: Director's Cut [12682]  (198)
  61. Crimes of Passion: Special Edition [LVD9523]  (198)
  62. Jerry Maguire [82536]  (180)
  63. Hoodlum [ML106282]  (162)
  64. Switchblade Sisters: Special Edition [RT1001L]  (160)
  65. Dracula: Dead and Loving It [80096]  (160)
  66. Alien: Special Widescreen Collector's Edition [1090-85]  (156)
  67. Lethal Weapon 2 [11876]  (144)
  68. Raw Deal [LVD9545]  (140)
  69. Lawrence of Arabia [79626]  (140)
  70. American President, The [80176]  (140)
  71. Last Action Hero [27936]  (136)
  72. Sword and the Sorcerer, The [13-010]  (136)
  73. Tuff Turf [I-5027]  (136)
  74. Usual Suspects, The [800638689-1]  (136)
  75. Grosse Pointe Blank [10040 AS]  (135)
  76. Now You Can See the Music [080 546-1]  (133)
  77. Video Standard, A [LD-101]  (126)
  78. Kate Bush: The Whole Story [080 504-1]  (126)
  79. JFK [12306]  (126)
  80. Desperado: Special Edition [11656]  (126)
  81. Replacement Killers, The [21626]  (120)
  82. Disclosure [13575]  (120)
  83. Sense and Sensibility [11596]  (120)
  84. Hook [70606]  (117)
  85. Dire Straits: Brothers in Arms [080 166-9]  (114)
  86. Adventures of Baron Munchausen, The [76986]  (114)
  87. Buck Rogers in the 25th Century [13-002]  (112)
  88. Seven Years in Tibet [21816]  (112)
  89. ABBA [74-006]  (112)
  90. Day After, The [13755]  (108)
  91. Michael Jackson: Making Michael Jackson's Thriller [VL1000]  (108)
  92. Close to You: Remembering the Carpenters [CLV7278]  (108)
  93. Muppet Treasure Island [7076 AS]  (108)
  94. Pavarotti & Friends: For War Child [440 074 202-1]  (108)
  95. Extreme Measures [94926]  (105)
  96. Class of 1999 [PCLV-10002]  (105)
  97. Client, The [13233]  (104)
  98. Boyz N the Hood: Special Edition [CC1289L]  (104)
  99. Specialist, The [13574]  (104)
  100. Lethal Weapon 3 [12475]  (104)
"Score" is defined as (Rot Level x Nb of Reports)
Top 10 Makers
(realtime)
  1. DADC USA  (1803)
  2. Pioneer USA  (1226)
  3. PDO UK  (851)
  4. Pioneer Japan  (707)
  5. 3M or IMATION  (395)
  6. Mitsubishi  (289)
  7. Kuraray  (233)
  8. Technidisc  (171)
  9. DiscoVision (MCA)  (154)
  10. DADC Austria  (149)
Ranking is defined as Nb of Reports/Factory

Note that humidity/water do not provoke laser rot. I sadly had a water disaster in my basement and some of my LDs spent 8 hours half immersed in freezing water. Except for the damaged covers and inserts, the disc are still playing nicely.

The main consequence of rot are those "multicolor video speckles/lines" appearing randomly on your screen and becoming more visible at the start or at the beginning of a side.

A stronger consequence can also affect the Digital Audio Tracks that will play with "clicks" and sometimes become completely mute for a few 10th of second because the data is so distored that it has no more meaning for your A/V Amp. This happened to me on Princess Bride CRITERION.

The final effect of a deadly rot will be a completely unwatchable LD. The player simply won't find it's start/timing/chapter sequence and give up playing after several tentatives.

Note that 8" LD Single do not use glue to keep the two sides together and should not be affected by laser rot. None reported so far.

Also, rot is disc/side dependant and could affect Side A while Side B remains untouched. People with access to several copies of the same set might sometimes be able to "reconstruct" a rot-free full set by checking each disc individually and selecting only the good ones.