Development status
With the development of commodity economy and science and technology, flat, convex, concave and other printing processes and special printing processes will be developed, different printing process characteristics and printability range are not the same, they will coexist for a long time, complement each other, and occupy a place in packaging printing. [1]
1, flat printing will remain the main force. Lithographic printing plate making is simple, plate material is light, the plate is fast, can quickly produce good quality, overprint accurate large format color printing products, especially suitable for printing and graphic products. In recent years, lithography technology has been continuously integrated into high, fine and sharp new technologies such as optics, chemistry and electronic computer technology, reflecting the contemporary high-tech level.
Package printing
Package printing
2, letterpress printing technology will have a breakthrough. Relief printing is a traditional printing process in China, with good technical foundation, less investment, and suitable for small batch, small format, special specifications and varieties of packaging printing; The paper and ink material requirements are not harsh, can adjust the printing pressure and control the ink amount in a larger format, so that the printing quality can reach a more ideal degree, and the application range is wide.
3, gravure printing will continue to develop steadily. The advantages of gravure printing have always been high speed, wide width, low consumption and less downtime, which can obtain the best results on a variety of printing materials.
4, screen printing will be more active. As a representative of hole printing, screen printing has always been based on workshop production in China, and is considered to be only able to produce lines, large color block products and not on the grand Hall. In today's technological revolution, modern screen printing equipment, materials and processes have injected new vitality into the screen printing process.
With the rapid development of science and technology, packaging printing technology continues to combine with emerging technologies and marginal disciplines, innovation and breakthroughs in strategic high-tech fields, and many new technologies have emerged, such as electrostatic printing, inkjet printing and digital printing technology. At the same time [2] From the perspective of today's printing technology development trend, China's printing press manufacturing technology is rapidly developing to a high degree of automation, linkage, intelligence, digitalization, networking and multi-color multi-functional direction.
New printing equipment has been widely used in the latest modern technology, including computer remote control, automatic printing, automatic registration of digital control, automatic fault monitoring display, shaftless technology, servo technology, ion spraying technology, optical fiber conduction technology. For example, the application of harmonic transmission technology in the printing press has the advantages of multi-tooth combination, large transmission ratio, small volume, light weight, large bearing capacity, high transmission efficiency, stable transmission rate, etc., which is conducive to improving the speed and working accuracy of the printing press, so that the printing production efficiency and the printing quality of the product are better taken into account.
Development trend
1, the development direction of lithography technology
Nowadays, the main international lithography topics are direct plate making technology, direct printing technology, non-horizontal printing technology and frequency modulation screen technology. Foreign sheet-fed multicolor offset press mostly uses ink remote control, automatic plate, automatic registration device, and the whole process of production control and fault diagnosis. The domestic start is late, and more efforts should be made in the research and development of a new generation of integrated multi-color offset press. In addition, the quality of domestic printing equipment (paper, ink, photosensitive materials, rubber blanket) also needs to be improved.
2, the development trend of flexographic technology
After the signing of the Montero Convention in 1995, the emission control of CFC chlorofluorocarbons has become increasingly strict, and the use of solvents such as trichloroethane and tetrafluoroethylene has also been restricted. In order to make flexible printing meet the requirements of environmental protection, there are two development ways, one is the development of new environmental cleaning solvents, and the other is the development, manufacturing and practical application of water development flexible plates. At the same time, plate thin will also be the development direction of flexographic printing.
3, gravure technology development trend.
Gravure equipment investment is large, plate making cost is high, only suitable for long-term products. Because gravure ink contains toxic substances, its application is limited. If these deficiencies can be solved, gravure printing will have a certain development. In recent years, the development of concave printing technology has greatly shortened the preparation time of gravure printing, and improved the competitiveness of gravure printing in the medium and short version of the live market. It is expected that the development of gravure printing in the future will mainly focus on: whole-body automatic gravure cylinder plating processing; The application of electronic engraving process without film; The development of photopolymer thin reel gravure technology and circular gravure wrapped on the drum; Digital fast proofing; Gravure printing press will develop in the direction of multi-purpose, multi-color, high-speed, automation, linkage and environmental protection; To realize water-based gravure ink printing, and effectively control the solvent residue of solvent ink.