Hi Bev, We've talked about taking the two or three worst cases, processing them, and then performing cross-sections to help determine acceptance. We are indeed a no-clean user, and I'm not really certain how much our flux is going to clean what is there. I've been surprised before, so if it turns out well, it will be just another lesson to add to my memoirs. Thanks, Leland -----Original Message----- From: Bev Christian [mailto:[log in to unmask]] Sent: Friday, May 02, 2008 4:04 PM To: TechNet E-Mail Forum; Leland Woodall Subject: RE: [TN] Cleaning of OSP Oxidation Leland, Sometimes they look worse than they are. Do you have a bare board like that you could sacrifice, that is run it through your process and see how it fares? Are you a no-clean or OA flux shop? If the latter, you are "probably" going to be OK. Bev RIM Opinions are my own and do not represent those of the company I work for. And no guarantee is implied by my answer and no liability is accepted by me if advice given does not produce the results wanted. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Leland Woodall Sent: Friday, May 02, 2008 3:34 PM To: [log in to unmask] Subject: [TN] Cleaning of OSP Oxidation Folks, I have about 30 OSP boards that have been processed on the bottom side, were stashed away or misplaced for 6 to 9 months, and recently brought to me for permission to process on the top side. Most of these appear to have varying degrees of oxidation, as the original light orange copper appearance has begun to look more like a 5 year old penny. Is there a way to salvage this product? Not only will they get the more complex components (appx. 70% of assembly cost) during top side build, but they must also undergo wave soldering of a 132 pin connector and several through-hole power transistors. I feel quite uncomfortable with doing anything other than trashing the product... Thanks, Leland Woodall --------------------------------------------------- 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 transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. --------------------------------------------------- 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 -----------------------------------------------------