... FR4, FR1,XPC, CEM-1 etc Copper Clad Laminate Sheet FR4Copper Clad Laminated Sheet (CCL) Characteristic and Application: 1. FR-4 ... other high grade electronic instruments.2. FR-1copper clad laminated sheet/CCL consist of bleached wood pulp paper, impregnated with flame ... with electrolytic copper foil. 3. XPC Copper clad laminated sheet/CCL consist of bleached wood pulp paper, impregnated with modified ...