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Gram: *0gsm&*5gsm&*0gsm Brightness: *4%~**8% Wood pulp: **0% wood pulp Performance: multi-purpose, can be used for fax machine, laser printing machine and so on; can be printed on both sides without problems; no curl; no jam Place of origin: China Package: **0sheets/ream, 5reams/carton or *0reams/carton, Loading : ********0reams/*0'container. Item *0 GSM 8.5X*1 Material wood pulp % CEI Whiteness ******2 < /TR> Whiteness > >*8% Brightness % ≥ ******4% Opacity %≥ >*4 Smoothness Front ≥ Smoothness Back ≥ Surface Roughness TS ml/min *****5 Surface Roughness BS ml/min ******0 Bending stiffness MD > >**0Mn Bending stiffness CD > >*0Mn Variation of two sides % ≤ Sizing (mm) ≥ Ash % Moisture content % 3.**4.5 < B>Tightness (g/cm3) ≤ Surface strength (m/s) ≥< /SPAN> Dust / Dirt (piece/m2) ≤ < /SPAN> PH Value COBB Test g/m2 ****3 Surface absorption g/m**0 Fracture length km Substance (g/m2) GSM *0 Substance variation CD (g) ≤ Thickness (um) *0.***1.0 Thickness difference CD (um) ≤