I found a short article in the "How It Works" series which might be =
helpful for your first question:
"DVD-Rs contain a clear layer of an organic material that is transformed =
into a colored dye when activated by the writing laser in an appropriate =
DVD drive. The points of dye left by pulse of the writing laser are then =
read by a low-power laser in the way that the pits of a standard DVD are =
read. Since the activated dye cannot be returned to its original clear =
state, a given DVD-R can be written only once."
Source: "Recording on DVDs." How It Works: Science and Technology. Vol. =
3. New York: Marshall Cavendish,=20
Hope this helps,
College of DuPage Library
Glen Ellyn, IL=20
From: firstname.lastname@example.org on behalf of Val Gangwer
Sent: Fri 7/8/2005 11:13 AM
Subject: [Videolib] Looking for technical information
I am looking for information on the actual burn process for DVDs. I was =
that these discs have a dye layer that is altered to make the copy. =
is that right? Second, do all home burning discs work the same way?
Thanks for any light you can shed.
Director of Audiovisual Services
Mary Baldwin College
Videolib mailing list
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">=0A=
I am looking for information on the = actual burn =0A= process for DVDs. I was told
that these discs have a dye layer that = is =0A= altered to make the copy. First,
is that right? Second, do all home = burning =0A= discs work the same way?
Thanks for any light you can =0A= shed.
Director of Audiovisual = Services
Mary =0A= Baldwin =0A= College
Videolib =0A= mailing list