Hi Jim, You did not say exactly what it is you want to accomplish. While still working at Bell Labs I developed test methods, which are now also an IPC TMs IPC-TM-650: TM 2.4.3.3, Flexural Fatigue and Ductility, Flat Cable, and IPC-TM-650: TM 2.4.3.1, Flexural Fatigue and Ductility, Flexible Printed Wiring. These TMs determine how many cycles of what bend radius flex cables and flexible printed wiring can sustain before conductur failure. I know that Trace Labs in Maryland does this kind of testing at least for copper foil per IPC-TM-650: TM 2.4.2.1, Flexural Fatigue and Ductility, Foil; I provide testing services for per all three of the TMs together with a full analysis. For details you can e-mail me off-line. Werner Engelmaier Engelmaier Associates, L.C. Electronic Packaging, Interconnection and Reliability Consulting 7 Jasmine Run Ormond Beach, FL 32174 USA Phone: 904-437-8747, Fax: 904-437-8737 E-mail: [log in to unmask], Website: www.engelmaier.com ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################