Dave, The following paper has wetting balance data at 245°C and 260°C. This should give you a ballpark figure for 255°C. http://xmembers.ipc.org/IPCLogin/IPCMembers/IPC/Review/1105/Nov2005ReviewTechPap.pdf Regards, Dan Blass Process Research Engineer Area Array Consortium Surface Mount Technology Lab Universal Instruments Corporation http://www.uic.com/wcms/WCMS2.nsf/index/Global_Svc_Support_31.html --------------------------------------------------- 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 847-615-7100 ext.2815 -----------------------------------------------------