Help! Emergency! We have a completed assembly (top assembly with many boards, hybrids, etc.) ready for shipment to our customer (space product). The last operation was to ink mark a S/N. The ink is cured at 150 F for 2 hours. The assembly was put in an oven at 150 C for two hours. After hours of reviewing all of the materials and bill of material, component by component (component data, supplier phone calls, etc.), the only item that is not rated for 150 C is the polyurethane conformal coating, which turned yellow/brown in color. Can anyone explain what actually happened to the coating and if it can be used as is? Thanks, Jim Marsico Senior Engineer Production Engineering EDO Electronics Systems Group [log in to unmask] <mailto:[log in to unmask]> 631-595-5879 --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------