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Dye Types

Discussion in 'DVD±R media' started by Pattykmn, Oct 19, 2004.

  1. Pattykmn

    Pattykmn Member

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    I'd like to know more about the different kinds of dye types.
    Mine said "phase change".
    I want to know how many different types there are and what do they mean?

    thanks :)
     
  2. herbsman

    herbsman Moderator Staff Member

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  3. Higgsbsun

    Higgsbsun Regular member

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    Phase change disks don't use dye, they have a crystaline layer for data storage. When heated by a high power laser and then rapidly cooled, the layer becomes amorphous and relatively matte. When heated by a lower power laser the surface anneals and cools into a reflective crystaline surface. The matte/shiny areas encode the data, and as the layer can be reheated, these disks are usually rewritable. DVD+-RW and DVD-RAM disks all use this technology. There is however, a limit to the number of transitions the layer can make, this is around 1000 re-recordings for DVD+-RW and 100,000 for DVD-RAM (which uses higher quality media and bad sector re-allocation).
     
  4. Pattykmn

    Pattykmn Member

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    Thanks :)
    What should I look for on DVD+R and/or DVD-R?
     

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