I have been told by fab suppliers that the flame retardency additives are the only thing that differ between FR-4 and G-10. I would like to know if anyone else has solid proof. G-10 is very available by fabrication houses and is approximately the same price as FR-4. Frank Hinojos Watkins-Johnson Co. *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************