Scott, The content of 610 regarding silver plate wire is one of those dinosaurs that is left over from the 70s and that originated in the very early Mil Specs or maybe even NHB. You will not even find a reference in MIL-STD-2000 to restrict silver. Contract documents and BOM commonly reference silver wire for production and the justification as I recall was improved shelf life and solderability. Additionally silver plate wire achieved preferred performance in solderability testing after steam aging required under 202. I'm sure there was a justification originally for the restriction but it was before my time and that is saying sumpin. Mel Parrish Soldering Technology International 102 Tribble Drive Madison, AL 35758 256 705 5530 256 705 5538 Fax [log in to unmask] www.solderingtech.com -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Scott Kauling Sent: Thursday, April 18, 2002 5:15 PM To: [log in to unmask] Subject: [TN] Silver With all of the discussion about the immersion silver, I have a few questions. Why can you not use silver jumper wire per IPC-A-610, but it is OK to use it for a board finish? I was given a sample of a conductive pen to try as an alternate for jumper wires and it contains silver. Is anyone using a product such as this on production boards or is this something that should be kept in the engineering lab as products are being developed? I am sure that you folks will clear up my confusion. SCOTT ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL 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 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL 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 ---------------------------------------------------------------------------------