Zhejiang Dongda Paper Co.,Ltd
Add:Gaoyang Village, Chunjiang Avenue, Fuyang District, Zhejiang Province, 311421 China
Coated Duplex Board Texture closely
The printing technique and the attention of the double board
1. Concentration: ink in large concentration of ink is less used in printing and ink color is better; Small ink in printing ink is more used, ink light;
2. Fineness: the size of ink particles and high inks; Large printing ink, clear and powerful print outlets; The ink is low, the dot of the printed matter is easy to hair, the printing plate has low printing rate;
3. Viscosity, large viscosity, easy to cause transmission ink, dot hair and flower version; Small viscosity, easy to cause ink emulsification and the layout of the surface;
4. Flow degree: large flow, it will make the text level unclear, ink color is not full; The flow degree is small, so that the ink spread is not smooth, uneven, easy to cause in the same printing surface of the former deep post-light or before the deep phenomenon;
5. Light resistance: bright ink with good light resistance, brilliant color printing, full and firm, solid, three-dimensional sense, and can be kept for a long time; Inks with poor light resistance, the color of the printed products can be lighter and darker.
6, water resistance, acid resistance, alkali resistance, for offset printing ink, pay special attention to the water resistance, acid resistance, alkali resistance, water resistance, alkali resistance, strong inks, printed products, bright color, distinct, points clear; Waterproof, acid resistant, alkali resistant, poor ink, the printed product is grey and weak, the level is unknown, the dot is not clean.
Coating double board generally requires close texture, smooth surface, uniform thickness, no hair on paper, good absorption and small scale, to meet the requirement of multi-color overprinting. In order to suit the requirement of the box, the coating should have a high degree of stiffness and strong folding resistance. The main technical indexes of domestic single surface coating are quantitative, tightness, sizing, smoothness, whiteness, transverse fastness, transverse stiffness, dust and moisture. Double plate coated with fibrous tissue is evener, surface layer has the packing and the composition of the rubber, and the surface coated with a coating, and through multiple roll calender processing, so the quality of a material of cardboard more closely, thickness is uniform, the paper generally is white and smooth, with a uniform ink absorbency, surface powder with less wool phenomenon, the paper is strong and has a good degree of folding, its moisture content is in commonly 8%, there is a certain scale, it brings the certain effect to printing. The difference between the double board and the coated paper, the offset paper and the paper is the weight of the paper and the thick paper. Coating and double plate paste is generally divided into MianJiang (surface), two, three, four layers, each layer of the pulp fiber ratio is different, and the layers of pulp fiber ratio, and according to the quality of the copy paper. The first layer is the surface slurry, which requires high whiteness, which has certain strength, usually bleached sulphate wood pulp or mixed with partial bleaching chemical straw pulp and white paper pulp; The second layer is the lining layer, which ACTS as the insulating layer and the core layer. It also requires a certain whiteness, usually with 100% mechanical wood pulp or light colored paper pulp; The third layer for core layer, the main filling effect, in order to increase the thickness of the cardboard, to improve the stiffness, generally USES the mixed waste pulp or straw, this layer is the most thick, quantitative high board commonly used several net trough points several times to hang pulp; The last layer is the bottom, have improve the look of the board, increase strength, prevent curl functions, usually with high rate pulp or better as raw material to manufacture paper with pulp and paper pulp board more than bottom color gray, can also according to the requirements in the production of other background color.
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