剛剛去柯達米國的網站上看了一下
有段FAQ提到
有些Ultima 80的包裝仍是12X
但是可以藉由讀取ATIP來判斷哪些片子可上24X
97m27s45f 只能上12X
97m27s46f 可以上24X
我手上正好這兩種片子都有
所以我來補充一下可以用眼睛觀察到的差異
在內環碼有Kodak 80的是97m27s46f
就可以上24X燒錄!

http://www.kodak.com/global/en/serv...s/faq1630.shtml
If you own some KODAK Ultima 80 media in 12X packaging, you can run a program like CDR Identifier to read the ATIP code molded into each blank CD-R. The distinguishing feature between Kodak's 12X and 24X-compatible media is the ATIP start-of-lead-in. Kodak's 1X-12X media had a start-of-lead-in code of 97m27s45f. Kodak's 1X-24X media has a start-of-lead-in code of 97m27s46f. The final and most recent version of CDR Identifier can be downloaded as freeware from:
http://www.gum.de/it/download