Memorex Black CD-R can be used for music, data & games. It offers 80 minutes of audio recording time or 700 MB of data storage, and up to 48x write speeds. It can only be recorded on Computer CD Writers and home audio CD recorders.
These CDs are black on both sides: the recording side and the top side (except for the silver words "Memorex" and "CD_R" etc. So you need a gel pen or silver/gold Sharpie if you want to hand-wright label them. Hope this helps.