I guess this is a technical question.

I need to make some backup CDs and just spoke to the people at MAM-A about their blank CDs. During the talk they told me not to use alcohol-based markers on CDs. I searched and found a marker called Lumocolor, made by Staedtler. Only one I could find that's alcohol-free.

Does anyone know if the alcohol is really bad for the CD, and are there any other brands of alcohol-free markers out there?

Thanks.

PS - I've been marking CDs since the early days with "Sharpies," and that's an alcohol-based ink. The ink has bled sideways on the top surface of the older discs, but I've never noticed it affecting the playback. So I'm not sweating over this issue, but I guess I should make a change if one is needed.