Hi Kenny! I have sort of a contaminating answer! The introduction of other elements into your wave solder pot is going to be a function of the diffusion kinetics of the specific element, the temperature/speed/ etc of your wave solder bath, and the amount of assembly board feet you process through the wave. No different than what you deal with for finishes today - the amount of silver and gold contributed from the new immersion finishes is small and could slowly build up over time. Some "contaminating" metals are lost/removed during de-drossing operations so as long as you are monitoring your wave solder bath composition you shouldn't get surprised and exceed the contamination limits listed in JSTD-001. Just another one of those "Pbfree" issue we need to address/understand. Dave "Bloomquist, Ken" <ken.bloomquist@G To: [log in to unmask] D-AES.COM> cc: Sent by: TechNet Subject: Re: [TN] Immersion Silver vs. White Tin <[log in to unmask]> 08/28/2003 03:07 PM Please respond to "TechNet E-Mail Forum."; Please respond to "Bloomquist, Ken" I have sort of a contaminating question. If you are using Immersion Silver on PWB's that are going to be wave soldered will the silver eventually contaminate the balance of the tin/lead in the solder pot? KennyB --------------------------------------------------- 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/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 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------