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My understanding is that all of the Blu-ray offerings in the Warner Archive Collection (which primarily offers MOD DVDs) have actually been pressed discs rather than true MOD discs.
Someone correct me, but that doesn't sound right. Retail audio CDs are called "pressed discs" because they have a layer of aluminum with binary data stamped into it as a pattern of microscopic dents.
But DVDs and Blu-rays have a chemical dye layer instead. An authoring laser permanently stains the dye layer to burn in the data pattern. It's the same principle as when you burn a CDR.
Thus DVDs and Blu-rays should be the same whether they are mass-manufactured editions or MOD jobs. As far as I know.
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Posted: |
Aug 25, 2016 - 5:48 AM
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By: |
Bob DiMucci
(Member)
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Here's an interview from last year with Warner's George Feltenstein about how the Warner Archive works:
http://www.warnerbros.com/blogs/2015/03/23/qa-george-feltenstein
Some relevant quotes:
"Q: At the time of the introduction of the Warner Archive Collection, was there backlash voiced by some people online about the MOD model or the manufacture-on-demand process?
"GF: Initially, there was trepidation among some people who perceived that because we were doing the manufacture-on-demand process that the discs were somehow like a DVD-R that you’d make on your own computer, but nothing could be further from the truth. Actually the cost to make our DVDs on demand is ten times the cost of making discs in bulk at our traditional manufacturers. However the savings are that when you sell a disc with MOD, you don’t have to worry about returns. Returns have been the bane of the home video business—as they were with the record business years before—where you could possibly end up with warehouses filled with unsold product."
. . . . . . .
"As far as our Blu-ray activities, that started in late 2012 where we were going to release one or two titles a month, and, just to be clear, those are not manufacture-on-demand. We manufacture our Blu-rays through our regular manufacturer because there is no way currently to do recordable media effectively in the Blu-ray realm."
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I understand, however, that other labels ARE producing Blu-rays on recordable media. But I haven't heard anything about their quality.
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CD-R, DVD-R. BluRay-R all have a dye layer that is altered by a writing laser, then read by a less powerful laser.
These are generally stable for the short, medium, and even long term if quality discs are used and stored correctly.
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