The surface of coated paper is white, smooth and smooth, with high smoothness and whiteness. It is a high-grade printing paper made of base paper coated with white paint. Coated paper is one of the main paper used in printing plants, coated paper is commonly known as, the official name should be printing coated paper. And it is widely used in real life at present, almost all of the beautiful calendars, posters sold in bookstores, book covers, illustrations and so on are made of coated paper.
Mainly used for printing advanced books and periodicals cover and illustration coated paper can be divided into single-sided coated paper, double-sided coated paper, matte coated paper and cloth coated paper. It can be divided into A, B and C according to the quality. Commonly used coated paper is divided into various thickness specifications ranging from 105 grams per square meter to 350 grams per square meter. In the sales of coated paper, the size of a single sheet is generally divided into two sizes: large (889mm × 1194mm) and moderate (787mm × 1092mm). In the past, the quality of lithographic printing was still low, copying classical oil paintings and other advanced painting works of art, mainly using this kind of paper to print on photographic screen color copperplate (letterpress). The quantity is 100,120,150,180,200,250g square meters, and the specification of flat packing is 787 × 1092 (mm) and 880 × 1230 (mm).
The main raw materials of coated paper are coated base paper and paint. The requirements for copperplate base paper are uniform thickness, small flexibility, high strength and good water resistance. There are no spots, wrinkles, holes and other paper diseases on the paper surface. the coating used for coating is composed of high-quality white pigments (such as kaolin, barium sulfate, etc.), adhesives (such as polyvinyl alcohol, casein, etc.) and auxiliary additives. This kind of coating with high fluidity and high solid content is brushed thin and evenly on the base paper by the coating machine, then dried, rolled into a reel on the reel machine, and then sent to the super calender for Calendering finishing, finally cutting, paper selection, packaging.
Cloth coated paper is pressed with an old blanket. in addition to its smooth surface and high whiteness, it also makes the printed graphics and pictures have a three-dimensional feeling, so this kind of coated paper can be widely used to print pictorials, advertisements, landscapes, exquisite calendars, character photography and so on.
