Gee, I haven't heard of GEE material before, but you're right, the third character is generally a color designation, although it's listed in MIL-S-13949 as "Special Consideration". GE is G-10 (non-brominated, hence non-flame retardant, epoxy), while GF is (brominated) FR-4. Timothy Reeves QA Manager/Process Engineer ECD Circuit Board Division |-----Original Message----- |From: Stephen R. Gregory [mailto:[log in to unmask]] |Sent: Wednesday, September 20, 2000 10:01 AM |Subject: Mil laminate designations... | | |Hi all!! | |What does the last "E" in the Mil designation type "GEE" |laminate stand for? |I though it was the color...for instance "GEN" would be a G-10 |natural color, |right? | |Also, is there any real difference in "GE" vs. "GF" laminate material? | |Thanks! | |-Steve Gregory- | ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8d ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################