There was a post on this last year. I have not tried the fix but, you are supposed to be able to precipitate some of the copper out by cooling the pot to close to the eutictic point. Scrape the sludge out. I suggest you take a look at the archives. Guy Ramsey Senior Lab Technician / Instructor E-Mail: [log in to unmask] <mailto:[log in to unmask]> Ph: (610) 362-1200 x107 Fax: (610) 362-1290 -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Phil Nutting Sent: Tuesday, August 14, 2001 8:48 AM To: [log in to unmask] Subject: [TN] Solder analysis results Ok folks, here is today's question. I just received a Certificate of Analysis (our first one) for the solder in our Soltec Waver Solder machine. All parameters are "within specification" except the percentage of copper which is at 1.6859. (Tin is at 61.3% and Lead is at 36.99% and other stuff is at 0.0199%) We run 63/37 in the wave. We only solder our own product, none of which goes into "mission critical" applications. We normally build our product to IPC-A-610C, Class 2. My question is two-fold. Should I worry about this? If so, how do I fix it with 1700 pounds of solder in the solder pot? Thanks is advance for sharing your knowledge. Phil Nutting Manufacturing Engineer Kaiser Systems, Inc. ---------------------------------------------------------------------------- ----- 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 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------