I have to say, _actual_ silver is very cool. When making audio CDs, they'll play in anything.
Miark On Wed, 19 Mar 2003 08:08:44 -0600 Tom Brinkman <[EMAIL PROTECTED]> wrote: > On Wednesday March 19 2003 05:19 am, Peter Watson wrote: > > There was a recent thread which talked about identifying the > > manufacturer of CD-R'S using ATIP information. I have since come > > across the following, I've no idea how true it is but it makes > > interesting reading. > > Thanks Peter. I've never had any reason to doubt atip info till > I read what you posted below. Guess I need to do some Google'in ;) > > If it's fact, then there is no way to tell who to heck made the > CDr's. Which if that's the case, I'm left with 'the greener the > better' when looking at the uncoated side ;) > -- > Tom Brinkman Corpus Christi, Texas > > > ====================================================== > > Charles Palmer, from cd-recordable.com, had this to say about the > > manufacturer identification: > > > > "Two components that many users of these programs always take as > > gospel are Media Manufacturer and Dye Data. These two readings are > > next to worthless. > > > > The reason for this is that many CD-R manufacturers (like CD- > > Recordable.com) purchase their stampers (the nickel die that all > > CD-R substrates are molded from) from 3rd party sources. These 3rd > > party sources (either other disc manufacturers, or mastering > > houses) encode the data that these 'Identification' programs read, > > at the time that the original glass master is encoded. The > > 'Manufacturer' information that is encoded is usually the name of > > the company that made the master. Since stampers made from that > > master will be sold to disc manufacturers the world over, all of > > discs that those manufacturers produce from those stampers will > > contain the same 'Manufacturer' information. Information which is > > obviously quite erroneous and irrelevant. Very seldom will the > > 'manufacturer' information encoded on a CD-R actually tell you > > anything other than who made the original master. [...] > > > > The second piece of data (the dye type) is also dubious. Because > > most master/stamper configurations are designed to be matched to > > specific dye types (Phthalocyanine, Cyanine, Azo, Etc), the 'Dye' > > information that is encoded when the master is produced indicates > > the type of dye that the master was designed for. This of course, > > does not assure that the manufacturer that buys and uses this > > stamper will be using it with the dye that it has been designed > > for. It is quite possible that a stamper/dye combination is used by > > a CD-R manufacturer that contradicts the 'dye' information encoded > > on the master. Therefore that information becomes as potentially > > misleading as the 'Manufacturer' data discussed earlier." The only > > reliable piece of information in the "ATIP" region is the disc > > length. > > ====================================================== > > > >
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