extremely bright, equably aluminiumed, flat and smooth surface, good adhesive force, hard to circumnutate, good stiffness Basic Parameter Parent metalsoffset paper (60-120g/), copper plate paper(80-400 g/), ivory board (210-400 g/)Technic Parameter Ration(Parent metals+7g) ±4% g /Folding resistance≥10 timesSurface tension≥36MN/m Compound cohesive force5NDelivery moisture content6±1.0%