Information about DVD Replication

DVDs can store up to 17 gigabytes of data. DVD replication is the method of transferring data from the source onto an optical disc. Do not confuse it with the process of duplication, as they are not the same. Duplication is the process of making an identical copy of an existing DVD.

When the source master is sent to the manufacturing plant it is checked for unreadable sectors. This is extremely important otherwise one could end up with defective and damaged discs.

Pressing discs to transfer data from the master onto the master mould is the first step of the process; in this case it is referred to as a glass master. Pits and grooves are created on the glass master with the help of laser beams.

The grooves that are formed during the glass mastering process are pressed against a nickel layer to create a stamper. The stamper is the mould for the DVD discs. Lastly, to create a disc, polycarbonate materials are molded along with the grooves onto the stampers. DVD’s require two layers of the polycarbonate discs, these discs are eventually bonded with each other.

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