... FR1,CEM-1,CEM3 copper clad laminated sheet can supply, made for PCB products, under RoHS, UL, SGS etc. certififcated Copper Clad Laminates sheet.Include CEM1, FR1 ... 02g/cm3 hydrochloric acid or proper organic solution .3) On laminated face, the defects such as bubble, impressed pitting, nick ... PCB of computers, home electric appliances and other lines . copper clad laminates sheet,FR1,FR2,FR4,CEM1,CEM3