102-104% brightness Brand Double ASPECIFICATION:Brand Name: Paper One & Double A paper 80gsm.Sheet Size:210mm x 297mm 8.5 x 11 inches.Quality: Imported 100% Virgin Wood PulpWhiteness = 102-104%, Natural WhiteCapability: High Speed Copying100ppm, LaserCapable, Inkjet Capable, Fax Capable.Surface roughness TS ml/min: 75-175Surface roughness BS ml/min: 100-200Bending stiffness MD:>110 MnBending stiffness CD:>50 MnOpacity: 95 minCIE whiteness: 167Cobb Test: 27-33 g/m2 27-33Two-sided usage gives the paper sheet high opacity.Smooth paper surface makes sharp printing and copying.