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What is the difference between DVD replication and DVD duplication?

Replicated discs such as DVD-5, DVD-9, and DVD-10 which are sometimes called "pressed" discs, begin with a process called glass mastering. During glass mastering, a stamper containing the data is created, which is then used to injection-mold the discs. These "pressed" discs have their data encoded as a series of microscopic indentations molded directly into the disc surface. Replicated discs have virtually 100% compatibility with DVD playback devices. Recordable DVDs (DVD-R and DVD+R) differ from replicated DVDs in that their data is not stored as actual indentations, but as laser marks made by burning tiny holes in the dye layer of the DVD-R media. DVDs created this way are called "duplicated" as opposed to "replicated" discs. 



 

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