Coated paper is commonly used to print pictorials, advertisements, landscape paintings, calendars, high-end books and other printed materials. Coated paper is smooth and smooth, with high smoothness and good gloss. It is used for color printing and has the characteristics of clear image, bright color and high saturation. At present, coated paper is also used more and more in the office field. Compared with special photo paper, coated paper is much cheaper, which can greatly reduce the cost of color printing paper. At the same time, the use of coated paper can also improve the printing effect and expand the application range of color printers. Coated paper has great applications in the fields of advertising, calendars, albums, tenders, recipes, business cards, cards, digital proofing, short-run printing, etc. potential.
Coated paper has good compatibility with most color laser printers, but it is not suitable for the current color inkjet printers with the largest quantity. The main reason is that it has poor adsorption of inkjet inks and it is difficult to achieve the desired results. Obviously, if the inkjet printer can print the ideal image on coated paper, it is undoubtedly a boon for the majority of inkjet printer users.
Characteristics of coated paper
Coated paper is also called coated printing paper, and it is called pink paper in Hong Kong and other regions. It is a high-grade printing paper made of base paper coated with white paint, and its main raw materials are coated base paper and paint. The coated base paper is uniform in thickness, small in stretchability, high in strength, and good in water resistance; the coating used for coating is made of high-quality white pigments (such as kaolin, barium sulfate, etc.), adhesives (such as polyvinyl alcohol, casein, etc.) and Composed of auxiliary additives, the whiteness of the paint reaches more than 90%, and the particles are extremely fine.
In the production process of coated paper, the coating machine applies the coating thinly and evenly on the base paper, then dries it, and rolls it into a roll shape on the reel, and then sends it to the super calender for calendering. The super calendered coated paper has a smoothness that is more than 10 times higher than that of ordinary offset paper, so that the coated paper can be in close contact with the printing plate and the dots can be clearly printed. In addition, the particles on the surface of the coated paper are smaller than the diameter of the printed dots, and the coating also has good ink receptivity. Therefore, its dot reproducibility is good, the ink layer is thin and the image is clear, and the dots are smooth. In addition, coated paper has good dimensional stability, high tensile strength and surface strength, and can meet the requirements of accurate overprinting. These characteristics make coated paper an excellent choice for high-end printed products.
There are many types of coated paper, ranging from 70 grams to 300 grams, and the types include single-sided coated paper, double-sided coated paper, matte coated paper, and textured coated paper. Coated paper with good softness can be used to print the covers of high-end books, picture books and newspapers, while coated paper with high gram and good rigidity is an excellent material for printing photos, business cards and cards. In addition, the coated paper has good waterproof performance, and there is no need for cold mounting or plastic packaging after printing, which can save the post-processing steps, save time, effort and money. The most typical advantage of printed output coated paper and printed output is that it can be output in small batches, does not require plate making, and is immediately desirable. It is more suitable for customers with small output.
However, the use of coated paper as an inkjet printing paper has many obstacles. The main reason is that most of the coated paper is not designed for inkjet inks. It has excellent affinity for oil-based inks, but it is not suitable for printing. The ink has poor adsorption capacity. When dye ink is used, ink scattering and flow ink often occur, while pigment ink is prone to pile up. It is precisely because of these problems that coated paper is currently not widely used in inkjet printers.
However, after some modifications, we can also print out on coated paper and get the same effect as printing. The following shows the output effect of our test.
The color inkjet printer has the same problem as the coated paper when outputting stickers. The coating is not designed for inkjet inks. It has excellent affinity for oily inks, but it has poor adsorption capacity for printing inks. When using dye ink, the phenomenon of scattered ink and ink flow often occurs, while the use of pigment ink is prone to pile up. However, after our modification, direct output was achieved without any coating. The following is the effect of the self-adhesive paper we printed directly.
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