Offset setting
Offset printing is mainly used for printing on paper-based materials. Printing on plastic films has many limitations. Sheetfed offset presses can change the printing format and are more flexible. At present, the printing format of most web offset presses is fixed. Its application is limited. With the development of technology, web offset presses are also constantly improving. Has now successfully developed a web offset press that can change the printing format. At the same time, a web-fed offset printing machine with seamless cylinder was successfully developed. The printing cylinder of this web offset press is seamless, which is already the same as the web gravure press in this field.
Offset presses are also continually improving in their printing capabilities. By improving and adding some parts, it can print corrugated cardboard. After improvement and installation of UV drying device, UV prints can be printed. The above improvements continue to expand the use of offset presses in the field of packaging printing. Water-based inks for offset printing will soon enter practical applications. Here offset printing is another step.
Gravure printing
Gravure printing, the ink color is full and three-dimensional, and the printing quality is the best among various printing methods. And the printing quality is stable. Plate life is long. Suitable for mass printing. Gravure can print extremely thin materials, such as plastic films. However, gravure plate making is complicated and expensive, and its benzene-containing ink
pollutes the environment. These two problems have affected the development of gravure. In particular, the reduction of a large number of prints, and the increase of short-run prints at a low price at the same time, make gravure continue to lose the market.
Advantage of Flexo printing
A. The equipment has a simple structure and is easy to form a production line. Among the three major printing equipments of offset printing, gravure printing and flexo printing, the flexo printing machine has the simplest structure. Therefore, the price of the flexo printing machine is relatively low, and the equipment investment of printing enterprises is small. At the same time, due to the simple equipment, easy operation and maintenance. At present, most flexo printing machines are connected with processing techniques such as soup gold, glazing, cutting, slitting, die cutting, creasing, punching, window opening, etc. to form a production line. Greatly improve labor productivity.
B. Wide range of applications and substrates.Flexo can print almost all prints and use all substrates. Corrugated paper printing, especially in packaging printing, is unique.
C. Water-based ink is widely used. Among the three printing methods of offset printing, gravure printing and flexo printing, only flexo printing currently widely uses water-based ink. Non-toxic and non-polluting, it is beneficial to protect the environment, especially suitable for packaging and printing.
D. Low cost. The low cost of flexo printing has formed a broad consensus abroad.
Post time: May-05-2022
