The die is a negative image of the glass master: typically, several are made, depending on the number of pressing mills that are to make the CD. The die then goes into a press, and the physical image is transferred to the blank CD, leaving a final positive image on the disc. A small amount of <answer>lacquer</answer> is applied as a ring around the center of the disc, and rapid spinning spreads it evenly over the surface. Edge protection <answer>lacquer</answer> is applied before the disc is finished. The disc can then be printed and packed.
How is the positive image on a CD protected? 
lacquer