Coated paper and brief analysis of printing knowledge

Coated paper surface is white, smooth and smooth, with a high degree of smoothness and whiteness. It is an advanced printing paper made from base paper coated white paint. Coated paper is one of the main papers used by printing houses. Coated paper is commonly known. The official name should be printed coated paper. In addition, it is widely used in current real life. Everybody sees beautiful wall calendars, posters sold in bookstores, book covers, illustrations, etc., which are almost all copperplate papers. Mainly used for printing high-end books and cover arts and illustrations Coated paper is a single-sided coated paper, double-sided coated paper, matt coated paper, textured copper coated paper. According to the quality is divided into A, B, C three. Common coated paper is divided into thickness specifications ranging from 105 grams per square meter to 350 grams per square meter. Coated paper sales in the sheet size is generally divided into generous (889mm × 1194mm), moderate (787mm × 1092mm) two sizes. In the past, the quality of lithographic printing at that time was still low, and high-level paintings such as classical oil paintings were reproduced, and the paper was mainly used to print on photocoating color copperplate (Toppan). Quantitative 100, 120, 150, 180, 200, 250 grams square meters, flat sheet packaging specifications for 787 × 1092 (mm), 880 × 1230 (millimeter).

The main raw materials of coated paper are copperplate paper and coatings. The requirement for the copperplate paper is uniform thickness, low elasticity, high strength, and good water resistance. The paper surface is not allowed to have paper spots such as spots, wrinkles, holes, etc. The coating used for coating consists of high-quality white pigments (such as kaolin, barium sulfate, etc.), adhesives (such as polyvinyl alcohol, casein, etc.), and auxiliary additives. of. The paint with high fluidity and high solid content is thinly and evenly coated on the base paper by a coater, then dried, rolled into a roll on a reel, and then sent to a super calender for pressing. Light finishing, final cut, paper selection, packing.

Cloth coated paper is pressed with old blankets. In addition to the flatness of the paper surface and high whiteness, the printed images and images have a three-dimensional effect. This type of coated paper can be widely used to print graphic arts and advertisements. Landscape paintings, exquisite calendars, portraits, etc.

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