Specification On emperor brand : Materials : 100% pure wood pulp Brightness: 102%-104% International standard-A4(210mm x 297mm) Moisture 3.5%-4.5%, Thickness : 103-110 um Surface roughness TS ml/min : 75-175 Surface roughness BS ml/min: 100-200 Bending stiffness MD :>110 Mn Bending stiffness CD :>50 Mn Opacity : 95 min CIE whiteness: 167 Cobb Test: 27-33 g/m2 27-33 Suitable for: Stay flat after copying Leave no dust in the copy-machine Nice appearance-white and clean Nice touch-smooth and bulky No see through-print both sides Guaranteed for trouble-free operation. Capability: High Speed Copying100ppm, Laser Capable: Inkjet Capable, Fax Capable. High performance for both sides printing/copying 500 Sheets per Ream 5 Reams per Box