TechNettters, not sure if this is a true NTC, but after looking at the postings about exposed copper, it occurred to me that the US one-cent coin is made of what I think is a predominantly copper material not likely to be an expensive superalloy. Whenever I get one made in the 1950s, it still shows has plenty of sculptural detail. Lou Louis Hart Technology Transfer Specialist National Technology Transfer Center 316 Washington Av Wheeling, WV 26003 304-243-2553 [log in to unmask] --------------------------------------------------- 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 -----------------------------------------------------