I've not heard of stripping tin/lead with caustic...board fabricators use nitric acid or acidic ammonium bifluoride-based strippers... I think the latter is better for tin-lead. Timothy Reeves ECD Circuit Board Division 13626 South Freeman Road Mulino, OR 97042 [log in to unmask] (503) 829-9108 (800) 228-8198 FAX (503) 829-5482 > ---------- > From: McMonagle, Michael R. > Sent: Tuesday, December 14, 1999 10:42 AM > Subject: Re: Removing Lead/Tin coating from copper traces > > You can remove the tin/lead with a strong caustic. Check Circuit > Technology > Corp's website at http://www.circuitnet.com/catalog/1153804.htm for Solder > Strip, used to remove solder from contaminated gold fingers before > replating. > > MikeMcM > > -----Original Message----- > From: Dr. Jolyon Browne [mailto:[log in to unmask]] > Sent: Tuesday, December 14, 1999 12:19 PM > To: [log in to unmask] > Subject: [TN] Removing Lead/Tin coating from copper traces > > > Hi TechNetters: > > I would like to remove the lead/tin coating on the external traces of > the PCB in order to expose the copper trace underneath the coating. How > can I do this? > > Thanks! > > Jolyon > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with > following > text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > information. > If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or > 847-509-9700 ext.5365 > ############################################################## > ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################