High qualitly Copiers companies of A4 copy paper 80g 1.Substance :70,75,80g/m22.Brightness:102~104%3.Quality:100% pure wood pulp4.Whiteness CIE1675.Thickness:110um6.Opacity:95%7.Roughness140ml/minSepcifaction: ItemA4 ,A5,A3, 8.5x11,8.5x13,8.5x14 ,B1,B2BrandHB NO.1, UM, OEMMaterialMix wood-pulp, 100%pure wood-pulpSizeA3, A4, 8.5X11”,..