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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 5618 reports on 3333 titles representing 1.03% of total collections
Top 100 LDs
(realtime)
  1. Eraser [14202]  (6765)
  2. Air Force One: Special Edition [71886]  (3549)
  3. Starship Troopers [71716]  (2414)
  4. Contact: Special Edition [15041]  (2208)
  5. Net, The [11616]  (2044)
  6. Under Siege 2: Dark Territory [13665]  (1872)
  7. Cable Guy, The [82426]  (1782)
  8. Men in Black [82656]  (1769)
  9. Ace Ventura: When Nature Calls [23500]  (1664)
  10. Heavy Metal [74656]  (1566)
  11. Jumanji [11746]  (1550)
  12. Copycat [14168]  (1550)
  13. Lost Highway [ID3946PG]  (1508)
  14. Professional, The [74746]  (1357)
  15. Fugitive, The [21000]  (1152)
  16. Beauty and the Beast: Work in Progress [1591 CS]  (1012)
  17. Striptease [84976]  (918)
  18. Shawshank Redemption, The [74596]  (918)
  19. Dante's Peak [43311]  (860)
  20. Fan, The [82476]  (850)
  21. Game, The [ID4260PG]  (828)
  22. Fifth Element, The [82406]  (798)
  23. Fargo [800638693-1]  (779)
  24. Demolition Man [12985]  (684)
  25. Batman Returns [15000]  (528)
  26. Boot, Das (The Boat) [99916]  (465)
  27. Volcano [0603985]  (459)
  28. The Beatles: Let It Be [4508-80]  (416)
  29. Willow [79356]  (406)
  30. Fair Game [14072]  (406)
  31. First Knight [71176]  (403)
  32. Dolores Claiborne [59906]  (336)
  33. Johnny Mnemonic [73476]  (308)
  34. Bad Boys [10716]  (300)
  35. Star Wars Trilogy: Definitive Collection [0693-84]  (299)
  36. Barb Wire [800639927-1]  (297)
  37. I Come in Peace [LVD9603]  (297)
  38. Gattaca [82646]  (276)
  39. Multiplicity [82446]  (275)
  40. Batman & Robin [16500]  (264)
  41. Hamlet [94996]  (242)
  42. Grumpier Old Men [14191]  (242)
  43. Fire Down Below [14914]  (231)
  44. WarGames [4714-80]  (200)
  45. Hunchback of Notre Dame, The [7955 AS]  (190)
  46. Aliens: Special Widescreen Collector's Edition [1504-85]  (180)
  47. Maximum Risk [27416]  (180)
  48. Blade Runner: Special Edition [CC1120L]  (171)
  49. Blade Runner: Director's Cut [12682]  (168)
  50. Mute Witness [41176]  (168)
  51. Crimes of Passion: Special Edition [LVD9523]  (168)
  52. Alien: Special Widescreen Collector's Edition [1090-85]  (156)
  53. Ace Ventura: Pet Detective [23000]  (154)
  54. Abyss, The: Special Edition [1988-85]  (153)
  55. Desperado: Special Edition [11656]  (153)
  56. Tin Cup [14318]  (152)
  57. Double Team [83236]  (144)
  58. Donnie Brasco [82516]  (144)
  59. Anaconda [81756]  (144)
  60. Usual Suspects, The [800638689-1]  (136)
  61. Last Action Hero [27936]  (136)
  62. Disclosure [13575]  (135)
  63. Day After, The [13755]  (133)
  64. City of Lost Children, The [40016]  (128)
  65. Sense and Sensibility [11596]  (120)
  66. Craft, The [82416]  (119)
  67. Raw Deal [LVD9545]  (114)
  68. Dracula: Dead and Loving It [80096]  (112)
  69. Grosse Pointe Blank [10040 AS]  (112)
  70. I Know What You Did Last Summer: Special Edition [23926]  (112)
  71. Muppet Treasure Island [7076 AS]  (108)
  72. Unforgiven [12531]  (104)
  73. Devil's Own, The [82466]  (96)
  74. Kate Bush: The Whole Story [080 504-1]  (95)
  75. Excalibur [22030]  (95)
  76. ABBA [74-006]  (90)
  77. Gunsmith Cats Chapter: vol.1 [CAVGS/001]  (90)
  78. Jerry Maguire [82536]  (90)
  79. Hook [70606]  (88)
  80. Video Standard, A [LD-101]  (84)
  81. Tingler, The [07776]  (84)
  82. Boyz N the Hood: Special Edition [CC1289L]  (84)
  83. Alien 3 [5593-85]  (84)
  84. To Die For [73436]  (84)
  85. Titanic [LV334812-WS]  (81)
  86. Few Good Men, A [27896]  (78)
  87. Seven Years in Tibet [21816]  (78)
  88. Specialist, The [13574]  (77)
  89. Robocop [ID5168]  (75)
  90. Legends of the Fall [78726]  (72)
  91. In the Line of Fire [52316]  (72)
  92. Dire Straits: Brothers in Arms [080 166-9]  (70)
  93. Pavarotti & Friends: For War Child [440 074 202-1]  (70)
  94. Hoodlum [ML106282]  (70)
  95. American President, The [80176]  (70)
  96. Welcome to the Dollhouse [82566]  (70)
  97. Switchblade Sisters: Special Edition [RT1001L]  (70)
  98. Sword and the Sorcerer, The [13-010]  (70)
  99. Adventures of Baron Munchausen, The [76986]  (70)
  100. Lawrence of Arabia [79626]  (70)
"Score" is defined as (Rot Level x Nb of Reports)
Top 10 Makers
(realtime)
  1. DADC USA  (1462)
  2. Pioneer USA  (896)
  3. Pioneer Japan  (535)
  4. PDO UK  (519)
  5. 3M or IMATION  (240)
  6. Mitsubishi  (231)
  7. Kuraray  (171)
  8. Technidisc  (131)
  9. DiscoVision (MCA)  (111)
  10. DADC Austria  (107)
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.