Technical specifications : Grading : a Multi-purpose High smoothness surface Perfect for high-quality printing and copying Super high whiteness produces outstanding clarity and contrast for all graphics/text Precision-cut edges for trouble-free Performance : Engineered for laser printers and high volume copiers Bright white paper High image contrast, clarity and sharpness. Paper size : 210 mm x 297mm (international a4 size) Substance: 80g / m2 Brightness : 102-104% Quality : 100% virgin wood pulp Whiteness: cie 167 Thickness: 110 um Opacity: 95% Roughness: 140 ml/min Capability: high speed copying>100ppm, Laser/inkjet/fax capable, two side Copying, extreme low jam rate 1/3500, easy to use, low dust. 500 sheets per ream 5 reams per carton box.