I'm going based on what I have read from people whom have used the material. If concerned, I'm sure they (Chris) can provide you with a sample to test or answer your questions. there is an entire thread http://www.avsforum.com/avs-vb/showthread.php?t=842769 about this material.
I have 2 samples (approx 6" X 9") but haven't run any tests myself ... nor do I know how