aviationwiz wrote:Yeah, I think you missed something in the post, like, the whole point of it, LOL. I know who made the disks, and of course I know how to check via CD Speed. I was wondering if the surface of the media had anything to do with it, which it unfortunetly, does not.
Yes, I guess I did misread your question. As for telling apart the discs without the benefit of packaging, a computer, or a label saying "Made in Japan", check for the frosted innner hub on the TY's and the ring of missing reflective layer in the CMC, as shown in the link I included in my first reply. And, of course, if you have a disc in your hands so that you can feel the roughness of the top side, then turn it over and and look at the recording side. CMC only makes phthalocyanine discs with a very pale light gold-green dye color, while TY only makes cyanine discs with the darker blue-green dye color. Much easier and surer than attempting to gauge surface roughness...
cfitz