Not so much a conspiracy, as with most manufactured goods, it's all about
cutting costs. If they can shave off a fraction of a penny per disc they
will, all discs are not created equally, I have some that are quite durable,
and others I worry will snap in two when removing them from their cases.
True, but discs are suprisingly inexpensive to manufacture in the first place.
They do require precision manufacturing methods in a strict clean-room
environment, but the whole process is extremely simple and the replication
process is autonomous for the most part. All that's done to press a disc,
after the pressing molds are made from the glass mother and nickel daughters,
are:
1. Injection of molten polycarbonate into a press under high pressure.
2. Rapid chill of the pressing.
3. Application of the aluminum substrate on the top of the clear pressed disc
by "sputtering" vaporized aluminum.
4. Sealing of the aluminum substrate with a spin-coated layer of acrylic.
5. Printing of the disc label.
6. Packaging of the disc.
Of course, this is for single layer DVDs and CDs. The process gets a little
more complicated with dual sided and RSDL DVDs, but it's still inexpensive,
relatively simple, and much lower in production costs to VHS tapes. It's more
expensive to actually make the glass mother than to make the actual plastic
replications.
A finished DVD package is cheaper to make than a finished VHS package.
However, DVDs are priced higher in the retail chain because:
1. Perceived premium status of DVDs in the marketplace over video cassettes,
which increases their retail value over VHS tapes.
2. Extra materials (featurettes, multiple soundtracks, etc.) that may be
included in a typical DVD set which would not be included in a typical VHS
release.
The only time optical discs have costed more to manufacture than video tapes
was in the days of LaserDisc. But, this was because the LaserVision format
required extremely high levels of quality control to make properly working
LaserDiscs as LaserVision is inherently linear FM analogue with no error
corrections. DVDs and CDs are inherently digital and benefit from a block
sector pattern strategy of the physical track with constant redundant
Reed-solomon error correction in the datastream to account for any minor
manufacturing defects, as well as damage at the hands of the consumer.
However, QC requirments for DVDs and CDs are still high in order to ensure long
term integrity of the product when handled by the consumer in the recommended
fashion: "always treat a CD or a DVD like a phonograph record when handling."
As for discs that look like they would snap in two when taking them out, that's
the first time I've heard of that. - Reinhart