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Flexographic printing is a type of letterpress printing. Originally referred to as “Fujino Printingâ€, it originated in the United States in the early 1920s. Since the use of aniline dye inks was toxic, it has not been developed. Since then, ink manufacturers have begun to use everyone. The accepted and acceptable colorant was renamed FlexoGraphic Printing in 1952 at the 14th Packaging Symposium in the United States and was also translated into Furui Toppan Printing in Taiwan. Since the mid-1970s, due to the advancement of the material industry, especially the advent of polymer resin plates and cermet anilox rollers, it has led to a qualitative leap in the development of flexographic printing. It has become the fastest growing printing method in the world. Especially in the United States, it has been fully developed. Both the printing press manufacturing technology and flexo printing application technology represent the highest level of flexographic printing. Most of the merchandise packages seen in the US domestic market are almost all flexographic products. According to statistics, the current market share of flexographic printing in the United States accounts for 70% in flexible packaging printing; 85% in label printing; 98% in corrugated printing; and 25% in carton printing. It also accounts for 60%, 35%, 85% and 2% respectively in Europe. In the United States, even 20% of newspapers are printed in flexo. These figures are enough to prove the vitality of flexographic printing.
The difference between flexographic printing and other printing methods lies in its unique features. First, the use of a soft polymer resin plate (such as the Cyrel version produced by DuPont Co., Ltd.) reduces the cost of plate making and shortens the platemaking cycle compared to gravure printing. , And due to the increase in the level of plate manufacturing and plate making technology, cable screen version can now reach the level of 175 lines, enough to meet the needs of general packaging and printing; Second, the use of anilox roller transfer ink, because the anilox roller is the transfer roller of the ink It is also an ink metering roller that realizes the same short ink path as the gravure printing and can accurately supply the ink according to the process requirements. At present, the metal-ceramic anilox roller that is laser-engraved can already reach the level of 1600 lines, which can accurately control the ink color and The thickness of the ink layer provides an advantageous means; the third is zero-pressure printing, which not only reduces the vibration and wear of the machine, reduces the wear of the plate, but also expands the range of the printing medium, and is particularly advantageous for the printing of flexible materials. Fourth, the narrow-format flexographic printing press has also expanded the function of the printing press. In addition to printing, a large number of post-printing processes can be completed, making the flexographic printing press a production line integrating printing and post-press processing.
The advantages of flexographic printing or its advantages are mainly reflected in the field of packaging and printing.
First, the ink is thick and the ink is the same. The flexo ink layer is thinner than the gravure printing but definitely thicker than the offset printing, which is very favorable for the large area color blocks commonly used in printing and packaging products. As the ink is transmitted by the anilox roller, generally speaking, if the condition of the paper is unchanged and the ink condition is No change, no matter whether it is the same batch of products or different batches of products can be consistent between the ink, which is the basic requirements of packaging and printing, and this is not easy to do offset printing.
Second, extensive use of non-toxic water-based ink printing. Flexo Ink is the only non-toxic ink approved by the US Food and Drug Association in all printing methods. As a result, flexographic printing is also known as green printing and is widely used in food and pharmaceutical packaging, which is beyond the reach of other printing methods. (To be continued)
The preferred printing (1)
In recent years, flexographic printing has achieved great development in China with its unique advantages in the field of packaging and printing. According to relevant department statistics, more than 130 flexographic printing production lines have been introduced in China. In addition, more than 7 domestic printer manufacturing plants have begun to produce narrow-width unit type flexographic printing presses. Flexo printing has been accepted by more and more domestic packaging and printing industry.