Jean-François: Call or E-mail the company below. They have an inexpensive way of finding flux on boards by dispensing a few drops of their formula on an area and rinsing it. Where ever there is flux, it will turn blue.. Regards, Ramon Umut Tosun [[log in to unmask]] ZESTRON Corporation > 21641 Beaumeade Circle > Suite 315 > Ashburn, VA 20147 > Phone :(703) 589-1198 ext-102 > Fax:(703) 821-9248 > Cell:(703) 608-9029 > Web: www.zestron.com > -----Original Message----- > From: Bissonnette, Jean-Francois [mailto:[log in to unmask]] > Sent: Wednesday, March 03, 2004 2:19 PM > To: [log in to unmask] > Subject: [TN] Flux Identification and Soldering over gold plated pads??? > > > Got two questions here > > First I would like to know if there is a way to identify flux residues on a > soldered assembly. For instance, I have a series of > board that have a glass like residues between the lead (SMT) and quite a lot > of it. It looks clear, little bit brownish and it > breaks like glass if I apply pressure with a dentist pick. Also where hand > soldering was done, the brown color is much > more obvious. > > Second. Any of you ever seen a board with gold plated lands instead of tin > plated? Well I would not be able to say it > it IS gold plated but it sure looks like it and not copper. > > Any help would be appreciated. > > Jean-François Bissonnette > Vérificateur, Contrôle de la Qualité > Électronique > Produits et Procédés > Vapor Rail Inc. > 10655 Henri-Bourassa O. > St-Laurent, Qc > H4S 1A1 > > (514) 335-4200 x2021 > (514) 335-4231 fax > > > > ***** CONFIDENTIALITY NOTE ***** > The content contained in this e-mail transmission is legally privileged and > confidential information intended only for the use of the individual or > entity named herein. If the reader of this transmission is not the intended > recipient, you are hereby notified that any dissemination, distribution, or > copying of this transmission is strictly prohibited. > > --------------------------------------------------- > Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 > for additional information, or contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------