RE: [Videonews] DVD-Rs[Scanned]

Mark Kopp (mkopp@iu08.org)
Tue, 6 Nov 2007 16:05:24 -0500

Hi Debra,

In short, the difference between a manufactured DVD and a DVD-R, is how
the data is placed onto the medium...duplication (DVD-R & DVD+R) vs
replication (DVD).

In a DVD-R or a DVD+R, a laser burns pits into a dye (duplication via a
burner), that is sandwiched between the layers of the disk. A
"manufactured" DVD has the data "stamped" (replication via stamping or
molding of a disk), onto it's surface. DVD replication is the method
used to manufacture bulk quantities of DVD's (generally speaking, over
1,000). A "glass master" of your original is made, which in turn stamps
the data onto a blank media. The disc is then printed and lacquered for
protection. Replication generally takes a much longer time than
duplication because there are more steps in the process, as much as one
to two weeks worth. Also, DVD replication requires much more pristine
working conditions than DVD duplication, as the slightest speck or hair
can mar the production.

Hope this helps,

Mark

Mark W. Kopp
Technology Assistant
IT Department
Appalachia Intermediate Unit 8
4500 6th Avenue
Altoona, PA 16602
P: 814-940-0223
F: 814-949-0984
C: 814-937-2802

-----Original Message-----
From: owner-videonews@lists.berkeley.edu
[mailto:owner-videonews@lists.berkeley.edu] On Behalf Of Debra Jo Sujka
Sent: Tuesday, November 06, 2007 3:19 PM
To: videonews@lists.berkeley.edu
Subject: [Videonews] DVD-Rs[Scanned]

I have kind of been out of the loop for a while; could someone tell me
how the DVD and DVD-R are different. Is there something physical that
can be seen on a DVD-R?

Debra Jo Sujka

>Chris McNevins wrote:
>
>"an appeal to producers and distributors to discourage using DVD-Rs for

>reproducing video material"
>
>
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VIDEONEWS is an electronic clearinghouse for information about new services, products, resources, and programs of interest to video librarians and archivists, educators, and others involved in the selection, acquisition, programming, and preservation of video materials in non-profit settings. The list is open to all interest individuals and list submissions are unmediated. However the list owner reserves the right to revoke subscriptions to the list in cases where the intent of the list is routinely violated or where general listserv etiquette and protocol are infringed.