I agree with Bev's first statement.. If you are going to destruct the part anyway, then stripping the gold and examining the nickel surface would be the easiest and most effective way to make your determination. Potassium Thiocyanate will not strip gold, for that you will need potassium cyanide. There are specific formulations to do this safely. Regards George Milad George Milad National Accounts Manager for Technology Uyemura International Corp (UIC) 249 Town Line Rd Southington CT 06489 [log in to unmask] Cell: (516) 901 3874 ************************************** See what's free at http://www.aol.com. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------