The item which concerns me was your advocacy that we use Sharpie™ markers to label our CD-Rs. There is a modest amount of anecdotal evidence that the use of solvent-based ink markers (Sharpies use an alcohol-based ink), particularly on CD-R/RWs without a protective coating and CD-R/RWs kept in a warm to hot environment can lead to long-term penetration of the ink to the data layer with resulting damage to the data....
In further researching the issue, I discovered that the standards organization for CD-R/RW media also advises that people use markers with permanent, water-based inks. They got their information going way back from Taiyo Yuden, one of the early manufacturers (and still a premier manufacturer) of CD-R/RW media.
Complete article here.

