... F4B,F4C -Weight:80gsm,75g,70gsm -Whiteness: 92-96%,98-100%,102-104% -Material:Bamboo pulp Bamboo pulp A4 copy paper :Color: White1 ... etc.The best choice for the office paper. ItemA4 copy PaperMaterial100% woodfree pulpSizeA4, A3, Letter size(8.5"x11),Legal size ... no dust in the copy-machineNice appearance-white and cleanNice touch-smooth and bulkyNo see through-print both sidesBeen developed for ...