... , FR2, CEM3, FR4 . 2.Size: 1020mm*1220mm . Copper Clad Laminates sheet.Include CEM1, HB, FR1, FR2, CEM3, FR4 .Thickness:0.6mm ... density 1.02g/cm3 hydrochloric acid or proper organic solution .3) On laminated face, the defects such as bubble, impressed pitting ... computers, home electric appliances and other lines . copper clad laminates sheet,FR1,FR2,FR4,CEM1,CEM3