Many people use markers to write on the surface of their CDs and DVDs when labeling their media. What most people do not know is that using markers, such as Sharpies, ballpoint pens, or any other sharp object can be very damaging to the media. Most markers contain chemicals that create oxidation, which can deteriorate the CD or DVD. The oxidation can ruin the aluminum, which covers the surface of the media and ultimately can destroy the data on the disc. Additionally, these types of markers can damage the physical structure of the disc.

There are a couple of ways to avoid these problems. Special pens are now sold which are made specifically for writing on media. One brand is called Staedtler Lumocolor CD/DVD Markers (pictured to the right). Another tip to keep in mind is that off the shelf markers can be used on media that has been screen printed because the screen printing protects the data from chemical destruction.