Judging from the present situation of printing industry, most graphic companies, export companies and printing houses mainly print on ordinary digital paper or imitation coated paper. As one of the most widely used papers in the printing industry, coated paper has a huge market demand. Because it was impossible to print directly on coated paper in the past, imitation coated paper appeared. Printing directly on coated paper has three advantages. Save costs. At present, the coated paper for printing is calculated at 7000 yuan/ton, which is converted into 200g/m2A4 format, and the cost per sheet is about 0. 1 yuan/sheet. Commonly used 190g/m2A4 digital proofing paper or imitation coated paper, the cost of sheet-fed paper is above 0.6 yuan/sheet. Functionally speaking, it can be printed directly on coated paper, and it is easy to solve the problem of "color following" in digital proofing, because the paper used for proofing and printing is exactly the same. Coated paper is widely used. Direct ink-jet printing of coated paper solves the problem of printing media, and also brings a broader market for batch print. Judging from the development trend of printing industry, digital operation will become the mainstream trend. On the one hand, it will reduce intermediate links, avoid the increase of equipment investment and labor costs, and improve work efficiency. On the other hand, the operation is simple and convenient, personalized service is highlighted, and printing can be done at any time, and printing has changed. From the application market of coated paper in the printing industry, coated paper is often used to print pictorial, advertisements, landscape paintings, calendars, high-end books and other printed materials, and has great potential in the application fields of bidding documents, recipes, business cards, product manuals, sample books, paperbacks and so on. Coated paper has the characteristics of high smoothness and gloss, clear image, bright color and high saturation when used in color printing, so it is widely used in small batch printing and digital proofing. Short version printing is widely used, which realizes personalized printing and conforms to the development trend of digitalization. Digital proofing has the advantages of low equipment cost, convenient operation, easy "color matching" and large format printing, and is gradually replacing traditional proofing and laser proofing, with huge market prospects. At present, more and more coated paper is used in the office field, which greatly reduces the paper cost of color printing.