We are offering high quality a4 & a3, letter size copy paper. material : 100% virgin pulp size : a4 size , 210*297mm; base weight : 70, 75, 80whiteness : 110% key performance quality: imported 100% virgin wood pulp whiteness = 110% , whitecapability: high speed copying 100ppm, lasercapable, inkjet capable, fax capable. thickness: 103-110 umsurface roughness ts ml min: 75-175 surface roughness bs ml min: 100-200bending stiffness md: > 110 mnbending stiffness cd: > 50 mncie whiteness: 148-152cobb test: 27-33 g m2 27-33