DVD replication is completely different from DVD duplication

A digital versatile disc or DVD can store data of up to 17 GB. In a DVD replication process data is transferred from one master source to another smaller DVD disc. Many people may get confused between DVD duplication and replication, yet they are completely different from each other.

The source master is initially sent to the manufacturing plant where it is checked for bad and unreadable sectors. It is very important to check for the bad sectors on the source master otherwise one can end up having damaged and defective disc.

The initial process begins with “pressing” the disc to transfer the data from master to “master mould”. It is also referred to as a glass master. Using laser beams, grooves and pits are created on the glass master. The length and spacing of groove is determined by the data that is contained in the master source.

During the process of glass mastering, grooves are formed which are made to press against a nickel layer to generate a “stamper”. A stamper is the mould for the DVD disc which is created with the help of glass master. These grooves are then copied on the stamper which becomes a part of that DVD disc. Finally, in order to create a disc, the polycarbonate substance is moulded along with the grooves on the stamper. A DVD requires two layers of polycarbonate discs which are bonded together.

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