nospam wrote: > the blue discs are the data life plus and are very good. in fact, > they're often called verbatim blues because of the dye colour. it's > their own formula (called azo), and as far as i know, only they make > discs with it. i've never used the other verbatim discs and have no > idea what colour those are.
Azo is a type of dye:
http://en.wikipedia.org/wiki/Azo_compound
It looked familar to me because at one time Kodak made a photographic print paper called Azo:
