Today emphasize to introduce the two paper, white paper and white cardboard, then introduces the difference between two paper: the front of the white board paper whiteboard paper is a kind of white and smooth, mostly gray board on the back. This paper is mainly used for single color printing, production of carton packaging. White paper positive dimension of 78 respectively. 7cm*109. 2 cm, and 88. 9cm*119. 4 cm, or produce other specifications as stipulated in the contract or the web. Usually have a coil plate, peace can be divided according to the needs of the customers. White board paper, because the fiber evenly, packing and the cause of the rubber surface, the surface coated with paint, and through multiple roller rolling processing, so the quality of a material of cardboard more closely, uniform thickness, is compared commonly white, smooth, uniform ink absorbency, off powder phenomenon are very few, paper is tough, easy to fold, but the moisture content is higher, generally around 10%, has the certain ductility, bring certain influence to the printing. The formation of white board is in a multiple round net of multi-cylinder paper machine or long net on the mixing machine manufacture paper with pulp slurry at the bottom of each layer. This process seems very complicated. General component is pulp MianJiang ( The surface) , two layer ( Lining) , three layer ( Core layer) And four layers ( The bottom) 。 Each layer of pulp fiber ratio is different, and depending on the quality of the copy paper pulp fiber than each layer are different. After the brief introduction of the white board paper, everyone should know some white board paper. Now let's introduce whiteboard paper briefly. White cardboard white cardboard used to make CARDS, covers, certificates, invitations, packaging decoration. White cardboard is a tablet of paper. Its size: 880 mm * 1230 mm, 787 mm * 1032 mm. According to the quality grades are divided into A, B, C three. A, B, C: we'll talk about some of its technical indicators. White cardboard, thick and hard, quantitative. Including quantitative 200 g/m2, 220 g/m2, 250 g/m2, 270 g/m2, 300 g/m2, 400 g/m2, and other specifications. The compactness of white cardboard is generally not less than zero. 80 g/m3, high whiteness. A, B, C, the whiteness of not less than 92 respectively. 0%, 87. 0% and 82. 0%. In order to keep the paper smooth, white cardboard to thick, strong, strong, high hardness and crack resistance. Different grades of paper of different quantitative hardness has different requirements. White cardboard usually need to 100% of bleaching wood pulp as raw material, the surface layer, the underlying the use of chemical coniferous wood pulp, sulphate core layer using hardwood chemical mechanical pulp, beating after adding calcium carbonate, barium sulfate, etc. , such as packaging, the use of AKD neutral sizing, pulp and paper pile of paper machine net layer is handled and become, according to the need, through the relief processing can produce special embossed designs board, all adopt the special embossed patterns of white cardboard don't check the smoothness and whiteness. In addition to white, through to the pulp dyeing, we can also produce all kinds of color card. At this point, besides white, other technical performance is in line with the technical performance of white cardboard. The above are some of the difference between white paper and white cardboard, we can slowly, in reality, the more contact, naturally.
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