Nitric is very aggressive. I wouldn't use it for cleaning copper oxide. You risk inducing a grainy copper surface, pitting, etc. etc. A 10% sulfuric solution has worked great for me for years. Hope this helps Franklin D Asbell -----Original Message----- From: nishath yasmeen <[log in to unmask]> To: [log in to unmask] <[log in to unmask]> Date: Friday, July 23, 1999 2:40 PM Subject: [TN] Copper oxide removal >Hello everyone! > Is Nitirc acid ( dilute) a better acid than sulfuric for cleaning >the oxide on plated copper? > Any information provided will be appreciated. > >Yasmeen > >############################################################## >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 ##############################################################