When it's not on DVD, it might still be on Laserdisc
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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 8578 reports on 4827 titles representing 0.98% of total collections
Top 100 LDs
(realtime)
  1. Eraser [14202]  (10721)
  2. Air Force One: Special Edition [71886]  (7980)
  3. Starship Troopers [71716]  (4800)
  4. Jumanji [11746]  (3627)
  5. Cable Guy, The [82426]  (3348)
  6. Ace Ventura: When Nature Calls [23500]  (3293)
  7. Net, The [11616]  (3256)
  8. Men in Black [82656]  (2916)
  9. Copycat [14168]  (2870)
  10. Contact: Special Edition [15041]  (2555)
  11. Lost Highway [ID3946PG]  (2336)
  12. Under Siege 2: Dark Territory [13665]  (2262)
  13. Heavy Metal [74656]  (1950)
  14. Professional, The [74746]  (1664)
  15. Beauty and the Beast: Work in Progress [1591 CS]  (1624)
  16. Shawshank Redemption, The [74596]  (1612)
  17. Striptease [84976]  (1525)
  18. Fugitive, The [21000]  (1430)
  19. Dante's Peak [43311]  (1350)
  20. Game, The [ID4260PG]  (1320)
  21. Fargo [800638693-1]  (1274)
  22. Fifth Element, The [82406]  (1224)
  23. Fan, The [82476]  (1197)
  24. Demolition Man [12985]  (1150)
  25. Volcano [0603985]  (792)
  26. Batman Returns [15000]  (666)
  27. Gattaca [82646]  (648)
  28. Boot, Das (The Boat) [99916]  (612)
  29. Bad Boys [10716]  (612)
  30. First Knight [71176]  (555)
  31. Willow [79356]  (540)
  32. Mute Witness [41176]  (504)
  33. Johnny Mnemonic [73476]  (486)
  34. Fair Game [14072]  (465)
  35. Ace Ventura: Pet Detective [23000]  (448)
  36. Star Wars Trilogy: Definitive Collection [0693-84]  (442)
  37. Aliens: Special Widescreen Collector's Edition [1504-85]  (442)
  38. Multiplicity [82446]  (435)
  39. Barb Wire [800639927-1]  (434)
  40. The Beatles: Let It Be [4508-80]  (396)
  41. Batman & Robin [16500]  (364)
  42. I Know What You Did Last Summer: Special Edition [23926]  (364)
  43. Tin Cup [14318]  (364)
  44. Craft, The [82416]  (364)
  45. Blade Runner: Director's Cut [12682]  (351)
  46. Devil's Own, The [82466]  (336)
  47. Dolores Claiborne [59906]  (324)
  48. Fire Down Below [14914]  (312)
  49. WarGames [4714-80]  (308)
  50. Grumpier Old Men [14191]  (300)
  51. Donnie Brasco [82516]  (288)
  52. Anaconda [81756]  (286)
  53. To Die For [73436]  (286)
  54. Double Team [83236]  (286)
  55. Hunchback of Notre Dame, The [7955 AS]  (276)
  56. I Come in Peace [LVD9603]  (264)
  57. Abyss, The: Special Edition [1988-85]  (242)
  58. Hamlet [94996]  (231)
  59. Switchblade Sisters: Special Edition [RT1001L]  (216)
  60. Maximum Risk [27416]  (200)
  61. Dracula: Dead and Loving It [80096]  (198)
  62. Crimes of Passion: Special Edition [LVD9523]  (198)
  63. Kate Bush: The Whole Story [080 504-1]  (192)
  64. Blade Runner: Special Edition [CC1120L]  (189)
  65. Alien: Special Widescreen Collector's Edition [1090-85]  (182)
  66. Matilda [86866]  (180)
  67. Lethal Weapon 2 [11876]  (180)
  68. Jerry Maguire [82536]  (180)
  69. Buck Rogers in the 25th Century [13-002]  (176)
  70. Dire Straits: Brothers in Arms [080 166-9]  (168)
  71. Eurythmics: Live [080 220-1]  (168)
  72. ABBA [74-006]  (168)
  73. Hoodlum [ML106282]  (162)
  74. Grosse Pointe Blank [10040 AS]  (160)
  75. Video Standard, A [LD-101]  (160)
  76. Last Action Hero [27936]  (152)
  77. Sense and Sensibility [11596]  (144)
  78. Hook [70606]  (144)
  79. Raw Deal [LVD9545]  (140)
  80. 300 [113764]  (140)
  81. Lawrence of Arabia [79626]  (140)
  82. Sword and the Sorcerer, The [13-010]  (136)
  83. Tuff Turf [I-5027]  (136)
  84. Usual Suspects, The [800638689-1]  (136)
  85. Now You Can See the Music [080 546-1]  (133)
  86. Gunsmith Cats Chapter: vol.1 [CAVGS/001]  (133)
  87. Michael Jackson: Making Michael Jackson's Thriller [VL1000]  (133)
  88. Extreme Measures [94926]  (128)
  89. Client, The [13233]  (126)
  90. Boyz N the Hood: Special Edition [CC1289L]  (126)
  91. Lethal Weapon 3 [12475]  (126)
  92. JFK [12306]  (126)
  93. Desperado: Special Edition [11656]  (126)
  94. Unforgiven [12531]  (126)
  95. Replacement Killers, The [21626]  (120)
  96. Disclosure [13575]  (120)
  97. Welcome to the Dollhouse [82566]  (119)
  98. Muppet Treasure Island [7076 AS]  (108)
  99. Dirty Dancing [ID5172]  (108)
  100. Close to You: Remembering the Carpenters [CLV7278]  (108)
"Score" is defined as (Rot Level x Nb of Reports)
Top 10 Makers
(realtime)
  1. DADC USA  (1918)
  2. Pioneer USA  (1377)
  3. PDO UK  (1070)
  4. Pioneer Japan  (799)
  5. 3M or IMATION  (446)
  6. Mitsubishi  (295)
  7. Kuraray  (249)
  8. DiscoVision (MCA)  (196)
  9. Technidisc  (195)
  10. DADC Austria  (155)
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.