If you want I can measure its UV absorbance for you. I have access to a UV-Vis spectrometer in my lab. You would have to send me a sample of your material that is about 1 sq.cm. Thickness should be a few milimeters so that calculations can be performed accurately. Let me know if you are...
There are two books I can recommend, and I can also offer you answers to most glassware design related questions you may have.
"Scientific Glassblowing" by E. L Wheeler and G. Ross Robertson
and
"Scientific and industrial glass blowing and laboratory techniques" by W. E Barr
I am an...