I think most yellow filter films will reduce UV from windows. Also do not forget the Fluorescent lights in the room. You will need to filter these as well. Regards, Steven J. Adamson Market Manager, Asymtek -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] On Behalf Of Kevin Land Sent: Tuesday, April 14, 2009 4:04 AM To: mems-talk@memsnet.org Subject: [mems-talk] Vinyl window films for UV processes Hi I am setting up a low cost facility for processing with SU-8 photoresist. I have read in a number of places of a vinyl film which can be purchased which can be stuck to an existing window to provide the necessary UV protection to the processing room. I think it needs to shut out all UV below about 450nm. I have searched for companies to purchase this from, but so far have not found the correct material. Has anyone on the forum used this material before and can give suggestions? Thank you Kevin