The hottest thin plate technology and corrugated p

Thin plate technology and corrugated printing (Part 1)

the post press processing and pre press processing technology of corrugated board printing is in a period of rapid development, and great changes have taken place. Monochrome printing business is less and less, and has gradually disappeared, replaced by the rise of color printing. In addition, flexographic plate making technology has also made great progress, which can effectively control and eliminate the negative impact of plate brushing (Development) inherent in the process itself

corrugated boxes are made of relatively heavy cardboard after slotting and high-quality surface processing. In order to improve the sales volume of commodities, manufacturers began to work hard on the outer packaging of commodities and strive to improve the attractiveness of the outer packaging of commodities. Therefore, cartons are becoming more and more packaged and commercialized. This is inseparable from the joint efforts and contributions of printing machine manufacturers, corrugated board manufacturers, roller manufacturers, ink manufacturers and plate manufacturers

2 in order to improve the ability and quality of post press processing of corrugated board in the early 20th century, we should strengthen the construction of major projects, improve innovation ability, and attract investment and intelligence. Corrugated board manufacturers began to adopt thin plate technology, which once made a leap in the quality of corrugated box products due to the reduction of production costs and cost savings. Color halftone printing of corrugated board has also become more and more 3: Base: it is more and more common for hydraulic cylinders to be installed on the base. The improvement of paperboard production process, the improvement of ink quality and the improvement of roller processing technology have laid a certain foundation for the application of thin plate technology, and effectively promoted the application of thin plate technology in flexographic printing technology

demand creates market

in the printing of corrugated board, a wide range of plate systems are used, such as various types of plates, plates with different thicknesses, plates with different substrates, double-sided tapes with different viscosities, and cushion materials with different elasticity, which can be matched to form a variety of different combinations. So far, no standard combination scheme has been formulated. Therefore, corrugated board printing manufacturers cannot determine the surface structure of the plate, the pressure absorption performance, the ink transfer performance, etc. Most corrugated board printing manufacturers have tried to test different combinations of different types of plates, tapes, backing materials and inks, and analyzed the results

it can be seen that the standardization of plate material system has become more and more urgent and prominent. Moreover, processing manufacturers are also trying to find the best combination scheme to meet the needs of printing on various paperboard materials

for a long time, corrugated board printing manufacturers have been longing for a special plate and looking forward to the emergence of this plate. They expect this kind of plate material processing method is very simple, does not need any special materials, is suitable for all plate making equipment, and can adapt to tropical, subtropical and continental climatic conditions. Based on this demand, the structure and performance of photosensitive polymers have been greatly improved, and they can also have very stable operating performance under different climatic conditions. Moreover, even after printing for millions of times, the transfer performance of inks can still remain constant. What customers need is plates with higher flexibility and better printability. Therefore, this market demand promotes the development of thin corrugated plates

in addition, the latest digital plates have also become an important issue in corrugated box printing. The new and thinner plate used for corrugated board printing has a black protective layer on its surface, which can be ablated by the laser emitted by CTP equipment

digital imaging technology is the general trend, so our goal is to follow the trend, develop towards digitalization, and improve the quality of printed matter at the same time. According to the development of market demand, plate suppliers have increased the size of plates. Not only does it have better ball control and more stable flight arcs of football, the new thin flexible plate has an additional layer of photopolymer layer, and the variety is becoming more and more complete. When printing with soft plates, the ink transfer performance is very good, the consistency is good, and the halftone image effect after printing is very good. Therefore, many printing manufacturers have given up their original hard plates and used soft plates for printing. In this way, the time of plate making is saved, which shortens the whole production cycle and reduces the production cost (including the cost of the material itself and the cost related to plate processing)

control the impact of brushing and dot expansion

when printing corrugated board by flexographic printing, in order to eliminate the impact of brushing (developing), it is necessary to adjust the printing pressure slightly higher, which will inevitably cause dot expansion. Generally speaking, the printing plate is deformed. 1. Main specifications: the larger the 100kN is, the more serious the dot expansion after printing will be, and affect the quality of the final print. Therefore, only low line number images and thick Yin text can be printed, and fine graphics and texts cannot be printed

in view of this situation, in order to reduce the deformation of the printing plate and improve the quality of the final printed matter, people have taken corresponding measures. The first is to use thin plate technology in the printing of corrugated board

next, the photosensitive polymer is improved to realize the standardization of the plate system. A few years ago, this kind of plate used in corrugated board printing has been put on the market, and has been continuously improved in the exposure tolerance, thus improving the quality of paperboard printing. This makes the thin version technology of corrugated board favored by people

Application in plate making and printing

generally speaking, thin plates with hardness between shore hardness can basically meet the requirements of corrugated board printing. This plate is specially designed for color halftone printing, line and field printing (suitable for all kinds of substrate materials). After the main exposure, there is a clear color difference between the exposed part and the unexposed part on the printing plate, and the contrast is relatively strong. In this way, the quality of the convex part (graphic part) on the printing plate can be easily controlled. (to be continued)