Yah, Bev raises a good point. There might be a few out there who don't recognize the ravings of an industry lunatic hyped up on caffeine for what it truly is. Soooooo, lets be clear, taking a material from -321F to 500F in an instant, a thermal shock of 821F, is more than almost any polymeric material (or most ceramics) could possibly handle, and so should NOT be done. Unless of course you are looking for new and fun ways to destroy something, or doing research in projectile motion, or have some LN2 you want to use up........ Doug Pauls The Count of Caffeine --------------------------------------------------------------------------------- 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 e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest 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 ---------------------------------------------------------------------------------