... paper Size:A4/A3 Base weight:70gsm,75gsm,80gsm Whiteness:94%-96% 98%-100% 102%-104% Mater:100% wood pulp Itemcopy paperMaterial100 ... , A3, 21*29.7cm 29.7*42cmBase Weight80gsm, 75gsm, 70gsmWhiteness94-96%, 98-100%, 102-104%Packing500 sheets per ream, 5 reams ... reams 100-102% brightness copier paper,98-100% brightness paper,94-96%brightness A4 paper