White paperboard is used for printing business CARDS, cover, ... 1092mm size ,magnanimous paper size for 850*1168mm,2,white carboard relatively thick strong ,quantitative bigger ,its quantitative 200g ... /m2,300g/m2,400g/m2etc. various specifications .3,white paperboard tight degrees usually not less than 0.8 ... /m3, the white degree the higher ,A,BandC third-class whitenness, ...