... ,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 ... 02g/cm3 hydrochloric acid or proper organic solution .3) On laminated face, the defects such as bubble, impressed pitting, nick and ... in PCB of computers, home electric appliances and other lines . copper clad laminates sheet,FR1,FR2,FR4,CEM1,CEM3