FR4,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, FR2, CEM3, FR4 .Thickness:0. ... removed by density 1.02g/cm3 hydrochloric acid or proper organic solution .3) On laminated face, the defects such ... appliances and other lines . copper clad laminates sheet,FR1,FR2,FR4,CEM1,CEM3