Whiteboard paper mainly includes the paper porosity, pore structure of the void fraction of paper said in the paper the ratio of air volume and the volume of paper, paper of the void fraction can be obtained by calculation method and experimental measurement. White paper of the air inside the void ratio = paper volume ( Per unit area) The volume/paper. Per unit area) X100 % from the above equation, the white paper inside the volume of air, the greater the showed that white board paper porosity is higher, it also verifies the whiteboard paper pore structure of the situation, the less paper fiber, mixed more hydrophobic, the greater the gap between the fiber and whiteboard paper pore structure is the worse. On the contrary, the paper fiber, the more intertwined, the smaller the gap between fiber, white board paper pore structure, the better. Paper printing ink solidification and drying is increased with the increase of void fraction is accelerated, the absorbency also increases, but on paper ink gloss is decreases with the increase of void fraction. White paper with pore structure, white board paper porous structure determines the permeability, hygroscopicity, absorption and compressibility, this paper can absorb water, ink and other material basis. In order to ensure good printing quality and printing effect, need printing paper has good absorbency. Whiteboard ink absorbency of paper is paper contact with ink and ink transfer to the paper surface, ink seep into the nature of the white board and be absorbed. Paper porosity is larger, the more loose structure, the more the amount of ink absorption, the opposite less, this is what we often call the reasons of the poor white paper good absorbency. Paper made black cardboard for 13 years, professional machine 2460 mm wide, conventional is generous or specification production, 5 tons minimum rules, the main production through the black paper single, double can through the black paper, cardboard, grey, black cardboard, etc. , due to the recent machine renovation, technological innovation, product had greater increase than before, both in paper and stiffness is very good, customers have to use black paper, primary source we always welcome your inquiry!
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