Kevin, wouldn't make it more complicated than necessary. Why not just use a Dremel with a suitable rondell and touch the solder joint for a second. It will be matte. And IF you still want to use a paint, consider that the light wave at that frequency may not see the paint black as you do, instead it may be transparent. Inge -------------------------------------------------- From: "Glidden, Kevin" <[log in to unmask]> Sent: den 29 March 2010 05:24 To: <[log in to unmask]> Subject: [TN] Low Outgassing, Black Sealant / Underfill > Good Morning, and Happy Monday. > > A couple of questions for anyone: > > We have a lighting application where we are getting light reflection off > two specific solder joints (we're so lucky to still use Sn63Pb37 they are > just TOO shiny!), so I am looking for a method to cover those joints with > a black (or dark gray) sealant. This would need to be a low out-gassing > material. Does anyone know of any such material? Is there such a thing > as black pigmented conformal coating? > > The second question would be for this same product. I also have a need to > seal around the base of some LEDs to prevent moisture ingress to the > bottom only terminations. Would perimeter sealing be sufficient? How > does one determine when they need to underfill vs perimeter seal? > > Thanks! > > Kevin Glidden > > ______________________________________________________________________ > 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 -----------------------------------------------------