Most CDRs are made by one of four or so manufacturers, but are just rebranded.
Check out this little program that tells you who really made it:
** EDIT **
Forget the URL I posted earlier, it was a version that was way out of date.
Use this one:
http://www.terra.es/personal8/tinnin/CDRIdentifier.zip
You'll be suprised. I've had cheapo no-name spindles have the same manufacturer as brand name ones.
BTW, I think the program requires a blank disc (i.e. you can't use one that's been burned to)