Cheryl, A precision lab balance (scale) is a repeatable method, although specific thickness is difficult to correlate. Regards, Ed Popielarski QTA Machine 27291 Jardines Mission Viejo, Ca. 92692 Phone:949-581-6601 Fax: 949-218-7829 <------NEW! WWW.QTA.NET Be true to your work, your word, and your friends. Henry David Thoreau --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 847-509-9700 ext.5315 -----------------------------------------------------