Here is a link to approved materials for the ITP Epilog Mini 50 Watt laser cutter.
The ITP Laser Cutter Template can be downloaded here: ITP Laser Cut Template
Once your job has been approved click: Laser Cut Sign Up
The Epilog Manual contains detailed information on how to operate the laser cutter as well as design and cut/etching settings and techniques.
Guide to cutting various plastics, and the results which happen with each type of plastic:
Laser Cutter Tutorial: How to setup your file.