... electrical and electronic more than twenty years, insulation and workpiece to be certified as the best ... appliances and other lines. FR-4 copper clad laminated sheet1.Materialcomposite polymer(flame- retardant epoxy resin, ... clothwith copper as cladding 2.TechnicsMixing ,Coating,Folding,Laminated,Return Line,Cutting,Packing3.Colornatural color(light green ... contact us ! FR-4 Copper Clad Laminated Sheet