... FR1, FR2, CEM3, FR4 . 2.Size: 1020mm*1220mm . Copper Clad Laminates sheet.Include CEM1, HB, FR1, FR2, CEM3, FR4 ... deep nick, pitting and glue spot on the copper foil covered face is not allowed. Any color ... .02g/cm3 hydrochloric acid or proper organic solution .3) On laminated face, the defects such as bubble ... home electric appliances and other lines . copper clad laminates sheet,FR1,FR2,FR4,CEM1,CEM3