Hi All, The double treat inner layer material we use often arrives with surface scratches - deep enough to be seen, but not deep enough to affect the underlying copper. These scratches are visible on the finished boards. Is this a cosmetic defect, or worse? Is board performance affected? Should our vendor be slipsheeting this material? Which essential question have I forgotten to ask? Thanks in Advance, Mark Hargreaves --------------------------------------------------------------------------------- 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 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 ---------------------------------------------------------------------------------