Zipper bag manufacturers introduce three packaging printing methods
1、 Offset printing
Offset printing is mainly used for printing paper-based materials. Printing on plastic film has many limitations. Sheet fed offset press printing format can be changed, 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 press is also constantly improving. Now we have developed a web offset press which can change the printing format. At the same time, the web offset press with seamless drum has been developed. Zipper bag manufacturers introduced that the printing drum of this web offset press is seamless, which is the same as web gravure press in this respect. The offset press is also improving its printing function. After improvement and adding some parts, corrugated board can be printed. After improvement and installation of UV drying device, UV printing can be printed. The above improvements continue to expand the use of offset press in the field of packaging and printing. Offset printing water-based ink will soon enter the practical application. Here offset printing is another step.
2、 Gravure printing
Gravure printing is full of ink and has three-dimensional feeling. Among various printing methods, the printing quality is the best. And the printing quality is stable. Plate life is long. Suitable for mass printing. Gravure printing can print very thin materials, such as plastic film. But gravure plate making is complex and expensive, and its benzene containing ink pollutes the environment. These two problems affect the development of gravure printing. In particular, the reduction of a large number of prints, short version at the same time requires a large number of low-cost printing, so that gravure printing market continues to lose.
3、 Flexographic printing
The main advantages of flexo printing are: 1. The equipment structure is simple, easy to form a production line. Among the three printing equipments, offset printing, concave printing and flexo printing, flexo press has the simplest structure. Zipper bag manufacturers introduced that the price of flexo press is relatively low, and the equipment investment of printing enterprises is less. At the same time, because the equipment is simple, easy to use, easy to maintain. At present, the vast majority of flexographic press, such as soup gold, glazing, cutting, cutting, die cutting, indentation, punching, windowing and other processing technology line, forming a production line. Greatly improve labor productivity. 2. Wide range of application and substrate. Flexographic printing can print almost all printed matter and use all substrates. Especially in the packaging printing of corrugated paper printing has unique. 3. 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. It is non-toxic and pollution-free, which is beneficial to environmental protection, especially suitable for packaging and printing. 4. The cost is low. The low cost of flexo printing has been widely recognized in foreign countries. http://www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag