Shirley, For some of us less informed, no joke, could you explain the ED foil process and how such things as drum rotation speed affects thickness. Also, if you can, please explaing various processes used to prepair outer layer foil surfaces for subsequent cleaning, imaging, plating, and etching processes. I'm especially interested in how thin is too thin under what processing conditions. Thank you much, Earl --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------