... materilweightbrightnesspackingsizevirgin wood paper70-80gsmAbout 92%-104%500 sheets per ream ,and 5 or 10 reams per cartonA3,A4,B4,B5The facture ... no dust in the copy machinenice touch-smooth and bulkywhite and smooth, low content of watercan't see through-print both ... generate acidic gassuitble for all kinds of laser,ink,jet printers and copiers.And our paper,is made of 100% virgen wood pulp.This ...