The author and his colleagues often say that printing is a bridge, allowing ink and paper to meet. When everything goes on paper, the arts pass under the “bridge†and the historical process is revealed to the world. Papermaking and printing are the two major inventions in China. They are the crystallization of human wisdom in China and are the pride and pride of the Chinese nation. With the development of society, the demand and demand of society for print has become higher and higher. This requires that the quality of printing and paper is getting better and better to meet the needs of customers.
Whether or not paper can be used for printing with high quality depends on the printability of the paper. The printability of the paper determines the quality of the print. The applicability and use of paper are mainly determined by the following aspects.
Paper Smoothness The smoothness of the paper directly determines the print quality of the print. The paper with high smoothness can make contact with the plate surface better when imprinting, so that the ink layer on the printing plate can be evenly transferred to the paper surface. Paper with low smoothness may be unevenly printed on the surface during printing, resulting in inhomogeneous contact between the surface of the plate and the surface of the paper during imprinting, and unevenness in the transfer of the ink layer to the surface of the paper. If you run into a paper with a low degree of smoothness, you can increase the pressure of printing appropriately at the time of printing, and you can make up for the lack of imprint on the surface.
Absorption of paper The absorption of ink by paper depends mainly on the degree of fiber-to-fiber tightness. If the gap between the fibers of the paper is too small, the absorbability of the ink on the paper may be reduced. If the gap between the fibers of the paper is too large, the ink pigment is also absorbed due to excessive absorption of the connecting material, so that the printed matter appears through the print.
Paper elasticity and plasticity paper will undergo various changes in the surrounding environment due to differences in handling, distribution, and printing.
Surface Strength of Paper The surface strength of paper determines the decisive influence of the wear resistance of the surface of the paper during printing. When printing, in order to get a clearer dot, some inks with higher viscosity will be used. If the surface strength of the paper is not enough, the phenomenon of powder dropping and hair loss will easily occur and adhere to the surface of the printed matter. This requires that a small amount of varnish is added during the printing process to reduce the viscosity of the ink; if a lower viscosity ink is used, in the lithography, the ink and the fountain solution will emulsify, causing the printing plate to be dirty. .
The moisture content of the paper The amount of moisture in the paper directly affects the quality of the printed matter. Too much water content will reduce the strength of the paper; if the water content is low, the paper will be brittle and easily damaged, resulting in static electricity. Since the moisture content of the paper has a great correlation with the surrounding environment, the humidity and temperature of the printing room should be properly arranged to maintain the moisture content of the paper.
Conclusion In conclusion, the brilliance and sharpness of prints depend on the smoothness of the dots, and the smoothness of the dots depends on the smoothness of the paper. Therefore, only the very smooth and smooth paper can fully reflect the level of the manuscript and the shape of the dot network, so that the printed tone can be clearly structured and achieve the desired effect.
Beauty Instruments
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