At 14:26 28.05.98 -0500, you wrote: >What is FR1 and how does it differ from FR4? Just my topic! FR1 is very similar to FR2, both are UL94-V0, both use a phenolic resin as binder. The only difference to FR2 is the phenolic resin, which is a different type. FR1 is mainly cold punchable and has a slightly better operation temperatur. Therefore, many laminate maker which produce FR1 do not produce FR2. Also, FR1 prices are the same as FR2. I consider myself as having some knowledge about laminates - still, I can't tell the difference between FR1 + FR2. FR4 is a glass epoxy material and is completly different. Jens Behrens Want to know more about laminate? http://www.felsweb.com/lam_faq.htm Laminate FAQ > >################################################################ >TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c >################################################################ >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://jefry.ipc.org/forum.htm) for additional information. >For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 >################################################################ > > > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ 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://jefry.ipc.org/forum.htm) for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################