David, Yes, we have seen the yellow tarnishing on some product. It has been our experience that the yellow tarnished product does not present assembly issues using noclean paste in nitrogen and VOC free wave solder fluxes. We do pursue the issue with our suppliers and assembly locations in order to resolve. We found in some cases that if boards are placed down on a surface that has sulfur on it, the yellowing becomes particularly noticeable. Thanks, Robert Furrow Printed Wiring Board Engineer Strategic Supply Global Account Manager Supply Chain Networks Lucent Technologies 978-960-3224 [log in to unmask] > -----Original Message----- > From: David [SMTP:[log in to unmask]] > Sent: Sunday, April 08, 2001 10:53 PM > To: [log in to unmask] > Subject: [TN] Immersion silver boards tarnish > > Has anyone ever exeprienced immersion silver MSP boards tarnishing, turned > yellow after stored in ambient condition? > > --------------------------------------------------------------------------------- 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 the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------