Hi Sheri, There are photo reactive glasses sold by both mikroglas and Corning. They form a positive of your exposure though (exposed glass crystallizes and is more attachable after anneal) We have found that it is very possible to process the glass using a photo aligner if it has high quality optics or by using just the bulb. The glass absorbs well around 320 nm (probably a cerium absorption). A typical mercury vapor lamp does have a line at around 315nm but it is not strong. Also BK7 glass (typically used to make optics for near UV and visible) does not transmit well at all in the 315 nm range. Therefore, you can use a lamp to expose Foturan if you give it a long exposure (on the order of hours) and if you don't have any BK7 glass optics in the system (I just stripped all the BK7 stuff out of an old aligner). If you have access to a laser you can use other UV lines, but this appears to be a multi photon process and so you need a high fluence which the laser provides (see Fuqua et al in MRS proc vol 624 pp79 to 85) Good luck Meg meg.abraham@aero.org