... manufacturing paper products such as copy paper, offset printing paper,writing paper,art paper,art card paper,duplex ... paper,ivory board paper,kraft paper,cup paper,news printing paper, tissue paper, toilet paper, and exercise book ... Whiteness:98-104% stable hue. 5.fine texture suitable for multiple printing methods specification physical test gsm350300250200whiteness% >=80Roughnessum ≤2.2Thicknessum ...