What type of pen can I use to write on my printable CD-Rs?
Using a felt tip pen is the easiest and fastest way to label a CD-R. Note, however, a few caution items. Due to chemical properties, inks can actually permeate the disc surface and cause damage to either the reflective layer or dye layer below the surface. There are approved pens on the market for the specific purpose of writing on a blank CD. Never use a ball point or hard point writing utensil as it may damage the disc.