Digital Commons at Penn State

A "glass master" is a glass disc etched with CD data in a process similar to photography or screen printing; it is the first step in the injection molding manufacturing process that is used to mass-produce CDs. Since our equipment can only write data to preformed plastic blank media, we cannot create glass masters. We can, however, write your data to a plastic CD, enabling you to test your application on a locked medium and to send the application CD to a duplicating house in lieu of sending a hard drive.