no.1 popular a4 copy paper in china

A4, A3, Letter size (8.5x11), Legal size (8.5x14) copy paper] 
Material: 100% Wood Pulp 
Size: A4, A3, Letter size (8.5x11), Legal size (8.5x14) 
Base Weight: 80GSM, 75GSM, 70GSM 
Whiteness: 94-104% 
Packing: 500 sheets/ream, 5reams/carton (box)

Specifications
Super premium multi-purpose A4 papers no recycling.
Basic weight: 70, 75, 80G/M2
Moisture 3.5%-4.5%
Whiteness: >92%
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: >94%
Brightness: 92-104%
CIE whiteness: 148-152
Cobb Test: 27-33 G/M2 27-33
Key Performance
No jam in photocopy machine
No double feed
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
Been developed for: Photocopy Machines, Laser Printers, Ink-jet Printers, Fax Machines.