In recent years, with the continuous development of screen printing technology, its application fields have continued to expand. In the packaging and anti-counterfeiting fields with flexo, lithography and gravure as the main printing methods, the screen printing market has gradually opened up. . Screen printing has occupied a large number of markets in packaging printing with its own unique strengths, and has shown a steady growth trend. And after combined printing with other printing methods, screen printing has become the main partner of other printing methods. All models are equipped with a rotary screen printing unit. Such printed packaging boxes or trademarks, labels, etc. not only highlight the brand characteristics of the packaged goods, but also enhance the anti-counterfeiting function. If printing transparent material labels or trademarks, it is necessary to first use screen printing to print the background color, and then use offset printing or flexo printing to register color logos and patterns. This combined printing method makes the printing effect different from that of general labels, which can improve the grade of the product. From the perspective of market development trends, this printing method will become more and more popular. Screen printing has excellent coverage and can be used not only for surface printing of transparent materials, but also for printing gold ink. Silver ink and hot stamping, thus expanding the role of screen printing in the field of packaging and decoration printing. The process flow of screen printing of packaging trademarks can basically be divided into four parts: pre-press design, printing plate making, screen printing and post-press processing. It is necessary to pay attention to the operation technology of each process in order to ensure the printing quality. Packaging is an important means of product protection, anti-counterfeiting, storage, transportation, and publicity. Nowadays, most products are sold through packaging. Packaging is the first appearance impression left by people on the product. When consumers buy packaged goods, they often do not look at the inherent quality of the goods, but make choices based on the information and appearance provided by the packaging. Since most manufacturers do not have the ability to design packaging and trademarks, designers and business personnel work closely together to actively help customers design high-tech and novel packaging, and show the novelty and uniqueness of products through the creativity and personality of packaging design. High quality, high grade, give full play to the technical expertise, win customers. It is necessary to give full play to the role of design and technology development institutions to achieve the purpose of forming a community of interests with the factory. At present, many packaging and trademark printing manufacturers have their own design and technology development institutions. In the design of packaging trademarks, excellent designers must be familiar with the plate making and printing process, be familiar with the post-press processing technology, and know whether the packaging works they design conform to the plate making and printing process requirements, and ultimately achieve the purpose of packaging. For the design of general packaging trademarks, it is required to be concise and clear, suitable for medium printing. Qifei only cares about maintaining her own design style and does not consider the difficulty of post-processing, causing unnecessary economic losses to the enterprise. At the same time, due to the difficulty of processing and the relatively poor product technicians, it is easy to lose the expected effect of the design. For example, for a trademark, the pattern is too close to the size of the finished product, often due to various factors such as paper deformation, insufficient precision of the die-cutting tool, etc., the die-cutting product is skewed, and the error is too large and the product is scrapped. Therefore, on the basis of constantly summing up experience and lessons, the enterprise needs to appropriately change the design to meet the requirements of the post-printing process. For some high-end packaging, or products with special design requirements, it is necessary to organize special personnel to tackle key problems during post-printing processing, and use superb technology to meet the requirements of customers and designers. In addition, designers and technology developers should also be good at utilizing the characteristics and advantages of the company's technical processes, actively guide manufacturers, and do everything possible to transplant these high-tech processes into packaging and printing through design. In this way, not only can the added value of packaging printing be increased, but also long and short can be made to give full play to the technical expertise and attract more printing business. The printing process of packaging trademarks is the technical organization of designing manuscripts and realizing mass reproduction through technical means such as plate making, printing, and post-processing. Since the printing and use materials of packaging trademarks are completely different from the printing processes of general books and periodicals, in the design of screen printing packaging trademarks, the characteristics of packaging trademarks used materials and printing processes should be fully considered. Printing paper Since the packaging and trademark printing of different businesses requires different types and specifications of paper, it is often necessary to reserve dozens of different types and thicknesses of paper. Such as single-sided coated paper, single-sided offset paper, single-sided coated cardboard, glued paper, cast-coated glass powder cardboard, white paper, gold paper, aluminum foil paper, kraft white paper, etc. The common thickness is 80g , 90g, 250g, 300g, 350g, 400g, 450g, etc. In addition, for different businesses, there are different requirements for paper and the use of operating technology, such as bottled wine labels, because it is mechanized labeling, the speed is fast, after the back of the sheet is automatically glued and wet, it will be deformed and bent instantly, and the The bending direction should match the automatic labeling machine, otherwise the production cannot be carried out on the automatic assembly line. Therefore, in order to meet the needs of different customers, the horizontal and vertical wires of the paper must be considered first when stitching and typesetting. The trademark produced by the main product does not meet the requirements of the customer's horizontal and vertical wires, causing the whole batch of products to be scrapped. The distinguishing feature of packaging trademark printing and book printing is that there are multiple spellings in one version and one picture. At least two pictures are linked, and as many as dozens of pictures are linked. In the end, it is more appropriate to combine several pictures for printing, which is the problem to be considered in design and technology. Mainly from the following aspects to be considered. 1. The difficulty of post-press processing. If a manuscript has many processing procedures, it is necessary to carefully consider not to make the printing layout very large. Otherwise, due to the poor control of temperature and humidity in the printing workshop, it is easy to cause the paper to rise, so that it is difficult to accurately overprint the aluminum foil and embossing in the next process. As a result, it should be hot stamped and embossed at one time, and it has to be hot stamped several times as a last resort. In addition, there are many joints and the paper is deformed, which will seriously affect the registration, which is difficult to remedy. 2. Special-shaped trademarks. Trademark labels are generally not very large. For thin paper special-shaped trademarks that need to be die-cut, do not join too much, otherwise the die-cutting quality will be affected due to the precision of die-cutting plate production. 3. The number of prints. If the number of prints is small, don't overdo it. Because the layout is too large and the number of prints is small, the cost of imitation is high, which will inevitably increase the cost of a single standard. 4. Number of paper openings. The size of the packaging paper matches the paper size, so the printing paper is standard and there is no waste. This is not the case with packaging trademarks. Due to the influence of the size of a single label, it is impossible to accurately spell out eight, four, and folio printing. Therefore, whether to adopt the joining methods of inserting, horizontal and vertical, nesting, one-knife punching, and knife-drawing, etc., is based on the principle of saving printing paper as much as possible. Choosing a good craftsmanship method can directly create profits for the enterprise.