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In the world of DVD replication, the master is the "glass master" used to create the tracks of pits which encode the DVD contents. The master is then copied by electroplating nickel to form a reverse image copy (with bumps instead of pits), called a father. The father can be used as a stamper in the DVD molding process (it usually is). Occasionally, the DVD factory will need multiple stampers for a single title, and it will copy the father in another plating process, to create a mother. The mother is then copied to create sons, which can be used as stampers in DVD injection molding machines.The term master is also sometimes applied to the reference copy (on DLT or DVD-R) that represents a finished disc project. In DVD factories, this is also referred to as the source.

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