Thanks, Peter. The test portion is without doubt, quite convincing. Aesthetics could be a problem if you have extensive mods - I agree. We were building Avionics, too - Weather Radars, Omega Navigation Systems and Ground Proximity Warning Systems. Regards, Lakshmi ----- Original Message ----- From: <[log in to unmask]> To: <[log in to unmask]> Sent: Tuesday, April 15, 2003 8:30 PM Subject: Re: [TN] Con Coat Stripper masking materials > Hi, Lakshmi, > > Several diverse reasons: > > 1. to carry out major mods, ensure the boards are properly clean and leave > the board looking aesthetically clean again afterwards. > 2. to carry out ICT (In-Circuit Testing) on the board. When you have 2000 > test points on a board, you can't mask them against coating and if you need > to test the board again after coating (field failure, mod programme, etc) > you have to remove the coating to allow the test jigs to make proper > contact. It's more straight-forward than trying to locally clean all those > test points. > 3. after a number of local mods or repairs, the coating looks pretty rough > and there's a good chance that it's no longer as effective as it should be, > so for aesthetic reasons again, but mainly to ensure adequate coating > performance and the minimum of entrapped residues, we strip and re-coat > boards. > > Our product is class 3, Avionics, so has to be always as good as we can get > it. > > Peter > > > > Lakshmi Dwivedula <[log in to unmask]> 15/04/2003 07:36 PM > Sent by: TechNet <[log in to unmask]> > > Please respond to "TechNet E-Mail Forum."; Please respond to Lakshmi > Dwivedula > > To: [log in to unmask] > cc: (bcc: DUNCAN Peter/Asst Prin Engr/ST Aero/ST Group) > Subject: Re: [TN] Con Coat Stripper masking materials > > > > > > > > > One of the reasons that Acrylic based Humiseal IB31 became popular (against > its polyurethane material) is because of its ability to allow rework > without stripping. Why do you need to strip the coat? You can perform the > modifications, (clean the soldering iron tip) and spot recoat with a brush > under a UV Light. > Regards, > > Lakshmi Dwivedula > > (978) 256 6214 > > Mail to: [log in to unmask] > --------------------------------------------------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8e > 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/html/forum.htm for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 > ext.5315 > ----------------------------------------------------- > > > > [This e-mail is confidential and may also be privileged. If you are not the > intended recipient, please delete it and notify us immediately; you should > not copy or use it for any purpose, nor disclose its contents to any other > person. Thank you.] > > --------------------------------------------------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8e > 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/html/forum.htm for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > ----------------------------------------------------- > --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------