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The One Ring Forums: Tolkien Topics: Movie Discussion: The Hobbit: Bad pressing and/or inferior materials: Edit Log



Darkstone
Immortal


Mar 27 2015, 4:31pm


Views: 6087
Bad pressing and/or inferior materials

The problem is that large runs of dvds are made by "replication". The orginal master is used to make a "glass master”. Laser lithography and electroforming are then used to produce a number of microreliefs. These "stampers" are used as injection molds, turning thermoplastic material into a micro-thin foil, which is then sandwiched between layers of poly-carbonate plastic. The disc is then lacquered, screened (labeled), packaged, and then you buy it. Because most of this process is automated, the cost per unit is very cheap and so this is how practically all cds, dvds, and Blu-rays are made.

For smaller runs of, say, 1000 units or less, "duplication" is used, where the master recording is used to make a digital recording onto a blank. This is how most people believe digital recordings are made. They are wrong.

Obviously the many steps of "replication" provide many opportunities for mistakes to creep in, quality to degrade, etc., etc. I won't even mention where one or more of the sub-contractors sharing the job of mass producing an initial release of a movie may skimp on the quality of materials or equipment. It also explains why in a initial release of dvds some may be flawed while others aren't.

******************************************
No Orc, No Orc!!
It's a wonderful town!!!
Mount Doom blew up,
And the Black Tower's down!!
The orcs all fell in a hole in the ground!
No Orc, No Orc!!
It's a heckuva town!!!

-Lord of the Rings: The Musical, music by Leonard Bernstein, lyrics by Betty Comden and Adolph Green

(This post was edited by Darkstone on Mar 27 2015, 4:40pm)


Edit Log:
Post edited by Darkstone (Immortal) on Mar 27 2015, 4:40pm


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