Aqua Regia is also geat at dissolving gold ----- Original Message ----- From: Rudy Sedlak <[log in to unmask]> To: <[log in to unmask]> Sent: 19 August 1999 23:19 Subject: Re: [TN] Etchant for SnPb solder > Yasmeen: > > FUNNY! > > We vendors work very hard at creating solder strippers (etchants) that will > etch solder (Tin/Lead) and etch the Copper as little as possible. Now you > want something that does both! > > Actually this is REAL EASY, if a little dangerous. Use Aqua Regia, or a 3 > part mix of Conc. Hydrochloric Acid, and 1 part Conc. Nitric. This mix give > off ugly fumes, which are not real healthy, but if you only have a few parts, > it will go through both Tin/Lead and Copper like a hot knife through butter! > > Alternately, contact any of the Tin stripper chemistry suppliers, and ask to > buy their product without the Copper attack inhibitors, you will get what you > are looking for. > If the Tin/Lead is not fused/reflowed, any Tin stripper will strip Tin/Lead > as well. > > Best, > > Rudy Sedlak > RD Chemical Company > > ############################################################## > 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 ##############################################################