Rick, thanks for shedding more light on the subject. Actually, I wasn't asking the question as I've been relatively worry free about it for some time - unless a customer gets overly concerned about it. I think Joe, and many others talk well about what it looks like and how it compares with other such findings as hole wall pull away. I've been through the well written 600 many times and can't even find anything concerning it. For me, Section 3.1, and in particular 3.1.1's figure showing the thermal and laminate evaluation zones and what falls out of it, pretty much tells the whole story. 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 ---------------------------------------------------------------------------------