1,Incomparable printing effect 2,Keep long-time printing quality 3,Unique air-buffer ply can make very good effective a, Special property of technology1,Thickness and layer(1)4-ply 1.96mm±0.02mm(2)3- ply 1.71±0.02mm2,Colour of surface purple3,Type of surface Soften4,Roughness of surface Ra 0.7~1.0μm5,Hardness of surface 68°±3°A6,Maximum linear extension 1%7,Maximum tension (DIN16621) greater than ...