Doug, Sorry I can't offer any known articles, but I would be interested in seeing if there are any out there. Our vendor tells us that the urethanes will discolor to a yellow and eventually brown tint with continued UV exposure, and eventually be more susceptible to cracking. We've witnessed this on the coating build-up of some fixtures we run through the UV tunnel multiple times. I have heard of a new parylene coating (parylene HT) that was developed to have increased UV resistance, but I have not seen it used yet. Kevin Glidden Manufacturing Engineer Astronics Luminescent Systems Inc. -----Original Message----- From: Douglas Pauls [mailto:[log in to unmask]] Sent: Thursday, November 11, 2010 8:20 AM To: [log in to unmask] Subject: [TN] UV radiation and conformal coating Good morning all, Does anyone know of any papers on the effects of UV light on conformal coating? Not talking the cosmic radiation hard space kind. I know it would be wavelength and intensity specific. Got a question from one of our engineers and I, of course, gave the very intelligent answer of "Beats me". But I have this wonderful resourse called Technet............... Doug Pauls ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------