What technology makes a CD-RW eraseable and rewritable as opposed to a normal CD-R?
Generally the information on a CD-R and a CD-RW is made up of microscopic indentations in the media that lies between the bottom surface and the label on top. A CD-RW has media that is based on a type of die that does not permantly hold the indentations. When you write to a CD-RW you are more or less “melting” the indentations into the media instead of permanently burning them in. (as the case with a CD-R When you go back and erase the disk you are then melting the media back to a smooth uniformed surface. Thus making it possible to erase and record over 1000 times.
