Shijiazhuang recharge card printing on printing related knowledge
Printing is a mass reproduction technology of original contents. It refers to the conversion of text, picture, photo, anti-counterfeiting and other original documents through plate making, ink application, pressure and other processes, i.e. transferring them to the surface of paper, fabric, leather or plastic materials by using ink.
1、 Current printing industry trend
With the rapid development of economy, China's printing industry has been greatly improved. Although the development of traditional printing industry is rapid, it is not only low profit, but also overproduction. According to statistics, the national construction time is only 50%, and there is a huge difference between the north and the south. In the information age, the Internet of printing industry is very important, which is also the inevitable trend of today's development, which can not only save resources and protect the environment, but also save manpower and broaden channels to meet the needs of printing industry.
2、 Types of printing process
The printing process can be roughly divided into the following four types according to the different materials, methods and operations: (1) relief printing, that is, the image and text part of the printing plate is raised higher than the blank part, and the printing principle is similar to seal. The most commonly used printing technology in the early stage, such as wood printing, movable type printing and type printing, etc.; (2) lithography, which is based on the principle of oil-water mixture (3) gravure printing, that is, the graphic part of the printing plate is lower than the blank part, which is the opposite of relief printing. It is usually printed by banknotes, stamps and other valuable securities; (4) hole printing, that is, the graphic part of the printing plate is holes, so that the ink can be transferred to the surface of the substrate through the holes See plate printing.
3、 Printing method
With the improvement of printing technology, printing methods are increasing, but the most commonly used ones are as follows:
(1) Offset printing, also known as offset printing, is one of the most commonly used methods of ordinary paper printing at present. It can not only restore the original color, contrast and level with high precision, but also use a variety of paper products to print, such as posters, instructions, packaging, books, introduction and other bright color printing.
(2) Screen printing is a widely used printing method, which can be divided into fabric printing, metal printing, ceramic printing, lottery printing, electronic products, stainless steel products, screen printing machine, glass printing, etc. Screen printing also includes hole printing, which has more flexibility than other printing methods. Because of its strong printing ink characteristics, it is suitable for the products which need a small amount of ink, such as film, metal sheet, glass, plastic fabric and so on.
(3) Flexographic printing, also known as aniline printing, is a kind of relief printing technology. Rubber and soft resin are usually used as printing plates and water-soluble pigments are used for printing. The printing dot and line fineness are gradually approaching offset printing. Flexographic printing methods are mostly used in plastic bags, labels and corrugated paper printing.
(4) Gravure printing, because of its high price, is usually suitable for printing high-quality and expensive printed matter, whether it is color or black-and-white picture printing, its effect can be comparable to that of photographic photos. It is usually applicable to the printing of stocks, gift certificates and securities.
In addition to the above printing methods, there are also some other printing methods, such as woodcut watermark, slate printing, resin printing, light printing and network printing. The above printing methods are of great significance in the development of printing industry, not only improve the printing process, but also promote the rapid development of the printing industry, reduce the image of waste of resources and provide utilization rate.
