The future development trend of packaging printing
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(1) Continuous improvement in offset printing
The main advantage of offset printing is that the printing process and equipment have been developed. The supporting raw and auxiliary materials are also fully mature. The printing quality is good and the cost is low. Has been accepted by domestic and foreign printing companies. At present, offset printing accounts for more than half of the total printing volume in foreign countries; in China, books, newspapers and newspapers have almost 100% offset printing. More than 800 offset printing machines have been introduced in packaging and printing. Many companies have not only added a lot of offset printing machines, but also introduced multi-color offset printing machines with world-class levels. The amount of glue printed has also accounted for about 60%.
Offset printing also dominates the packaging sector. Both domestic and foreign, for a long time. The proportion of offset printing may be reduced, but its dominance will not change. Offset printing is mainly used for printing paper-based materials. Printing on plastic film has many limitations. Sheet-fed offset printing presses can be changed 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. A web offset press that can change the printing format has been developed. At the same time, a seamless web offset press was developed. The printing cylinder of this web offset press is seamless and has been identical to the web gravure press in this respect.
Offset presses continue to improve on printing capabilities. Corrugated cardboard can be printed by modifying and retrofitting parts. UV prints can be printed with improved and retrofitted dryers. Offset inks will soon be put into practical use, which will be another advancement in offset printing.
(2) Gravure needs to reduce costs
Gravure, full color and three-dimensional, in the various printing methods, the printing quality is the best, and the printing quality is stable, the printing plate has a long life, suitable for high-volume printing. Gravure printable material for the book. Such as plastic film. However, the gravure printing plate is complicated and expensive, and its benzene-containing ink pollutes the environment. These two problems have affected the development of gravure printing. In particular, the reduction of large-volume printing, while requiring a large number of low-cost printing, has caused gravure to continue to lose market. The proportion of gravure printing in the printing field will decline year by year, even in the field of packaging and printing.
In the US flexible packaging printing market, gravure is only 10% and is declining. In China's flexible packaging printing and cigarette printing, gravure has an important position. More than 200 sets of gravure printing machines have been introduced, and too many gravure printing machines have been introduced in some areas, resulting in excess production capacity, which was formed under special circumstances in China.
Due to advances in technology, gravure presses are constantly improving. The application of gravure printing plate direct plate making (OTP) and the gradual promotion of water-based ink for gravure printing have gradually solved the two major problems of gravure printing process. With the settlement of important problems in gravure. Whether it will reverse the downward trend of the gravure process, it needs to be tested in practice.
(3) Flexo printing will gradually become mainstream
1. The main advantages of flexo printing
(1) The equipment has a simple structure and is easy to form a production line. In printing equipment such as offset printing, gravure printing and flexo printing, the flexo printing machine is the simplest structure. Therefore, the price of the flexo press is relatively low, and the investment in the printing enterprise equipment is small. At present, most of the flexo printing machines are combined with processing processes such as bronzing, glazing, cutting, slitting, die cutting, indentation, punching, window opening, etc., which greatly improves labor productivity.
(2) A wide range of applications and substrates. Flexo printing can print almost all prints and use all substrates. Especially in corrugated printing in packaging and printing, there is uniqueness.
(3) Widely used aqueous inks. Among the three major printing methods of offset printing, gravure printing and flexo printing, only water-based inks are widely used in flexo printing. Non-toxic and non-polluting, it is beneficial to protect the environment, especially suitable for packaging and printing.
(4) The cost is lower. The low cost of flexo printing has formed a broad consensus in foreign countries. There is still controversy in China. The main reason is that the flexo printing machine, flexo printing plate and flexo printing ink used in domestic flexo printing are mostly imported, and the cost is relatively high. high. Offset and gravure are relatively low cost in this regard. With the local production of flexo printing equipment and its plates and raw and auxiliary materials in China, its cost will gradually decrease.
2. The main reason for the slow development of flexo printing in China
(1) Existence and specific problems: After the 1970s, the international era was a period of rapid maturity in technology. At that time, China was fully promoting the development of offset printing. The development of offset printing is undoubtedly correct, but there is less publicity on flexo printing. Many people in China know very little about flexo printing, and printing workers know less about flexo printing. Therefore, the flexo printing machine introduced in the 1980s is really Little is fully effective. In the mid-to-late 1990s, China imported more foreign flexo printing machines. At the same time, the flexo printing machine developed by China gradually matured, but it was not good for the printing process. Some users purchase flexo presses that are not suitable for the prints they are ready to print.
(2) Domestic printing of flexographic printing plates and raw and auxiliary materials has a long way to go: At present, most of them rely on imports. This is an important reason for increasing the cost of flexo printing.
(3) Unreasonable requirements for flexo printing: At present, domestic flexo printing machines, whether imported or domestically produced, are basically medium and low-end products. In addition, the domestic flexo printing process is still not completely passed, and its printing is of course in the middle and low grade. Many people take these printed products and higher grade offset printing, and it is unreasonable to compare the gravure printing products. Foreign experience has long proved that flexo printing can completely print high-end prints. However, there must be corresponding equipment and corresponding plates, raw and auxiliary materials, as well as mature processes and high level operators.
(4) Choosing the right equipment and printed products: Flexo printing can not only play a special role in the field of packaging and printing, but also play a full role in books and newspapers. Flexo printing has its own unique features in packaging and printing, and a consensus has been formed in the printing industry. Corrugated board printing in packaging printing can best utilize the advantages of flexo printing. 85-98% of foreign corrugated cardboard is printed on a flexo press. Label printing is also the strength of flexo printing. The proportion of flexographic printing in developed countries is 85-90%, and it is also developing rapidly in China. Flexible packaging printing is the main competition for flexo and gravure, and the development of countries varies. There is competition in offset printing, flexo printing and gravure printing in carton printing, and the development of different countries is different. Flexo printing should be used first in prints that are best suited for flexo printing. According to the specific requirements of these prints, choose the most suitable flexo press.