After China's accession to the WTO, China's tobacco industry was pushed onto the stage of economic globalization. The reduction of tariffs and the entry of foreign tobacco brought tremendous challenges and rare opportunities to China's tobacco industry. The reforms reorganized the Chinese tobacco industry.
The state's plan for tobacco companies is a three-step process: the first step is to shut down the 100,000-ton or less tobacco plant; in the second step, 100,000 to 300,000 boxes of enterprises will merge; and in the third step, optimize and adjust the types of enterprises to cultivate a Batch of large enterprises with international competitiveness. The Chinese tobacco printing industry, which has been under the care of state-owned assets, has to adjust its own pace under the merger and reorganization of the tobacco industry. With the development of the times, human beings attach importance to the environment, and green and environmental protection have become the cornerstones for scientific and sustainable development of various industries. Will China's cigarette packet printing industry also be able to achieve a more brilliant step in the new century and achieve a harmonious development? The document [2002] No. 74 from the National Tobacco Board and the Notice on Implementing IS014000 Series of Environmental Management Standards in the Tobacco Industry, let us see the importance attached to the environment by the National Tobacco Board.
The market competition has become increasingly fierce. The cigarette packet printing industry, which has always been known as the profit-making industry, has also become more intense with the separation of state-owned assets. The strengthening of management and the development of new products and technologies have become the pursuit of cigarette pack printing industry. An important way to benefit. This article on the modern high-end cigarette packs use more vacuum aluminum paper printing process for analysis.
Vacuum Aluminized Paper Recognition
Vacuum aluminum-plated paper is mainly composed of base paper, coating and aluminum layer. It is a new type of environmental protection product that has taken its place in the domestic cigarette printing market. Due to its unique degradability, anti-counterfeiting and recyclability, it is favored by the domestic cigarette printing market. Its specifications can be divided into vacuum aluminum plated paper and vacuum aluminum plated paper. Vacuum aluminum plated paper can be divided into ordinary type and holographic anti-counterfeiting type. Vacuum aluminum plated paper can also be divided into ordinary vacuum aluminum plated paper. And holographic anti-forged vacuum aluminum paper. According to different processes can be divided into direct aluminum and indirect aluminized paper. According to different weights (150 g/m2 to 350 g/m2), it can be divided into different varieties.
Compared with traditional gold-silver paperboard and aluminum-plated PET film composite paper, the biggest characteristic of vacuum aluminum-plated paper is environmental protection. Traditional gold and silver cardboard is a composite product of aluminum foil and paper. Its aluminum consumption is more than 200 times that of aluminum-plated paper, and the thick aluminum layer is not conducive to recycling. Aluminum-plated PET composite paper is a composite product of aluminum-plated film and paper, which is also not conducive to environmental protection. The thickness of the aluminum layer of vacuum aluminum-plating paper is only 0.03-0.04μm, and the aluminum consumption is very small, and it can be completely degraded, belonging to a non-polluting product. Its other big advantage is that laser anti-counterfeit treatment can be carried out. PET film is subjected to mold processing, and then transferred to paper after aluminum plating, so that the surface of vacuum aluminum coated paper shows a radiant and dazzling laser anti-counterfeiting pattern. These patterns can be made into text, lines and images according to the requirements of customers, which is conducive to customers' promotion of brands and images. Because holographic laser anti-counterfeiting paper has a large investment in production and the production process is difficult, it is not conducive to the imitation of small-scale companies and has a certain anti-counterfeiting effect. It is also in line with the timeliness, aesthetics, identification, versatility, and economy of the five international packaging industry's proposed indicators for packaging materials.
Vacuum aluminum lining paper is generally only embossed, but there are also some lining papers for printing anti-counterfeiting and promotional brands, printing simple text and icons on paper. It should be noted that the graphics printed on the lining paper, such as direct contact with cigarettes, are more demanding in the use of inks and the printing process, generally using non-polluting water-soluble inks, and should prevent the ink from opening up the odor of the paper. The effect of taste.
Vacuum aluminum coated wrapping paper is a kind of wrapper that is popular among domestic high-grade cigarette labels. Its basis weight is 80-350 g/m2. Because its surface is less absorbent metal paper, it is more difficult to print than copper plate. Paper, white cardboard, etc. are much larger. But its printability is still relatively wide: suitable for offset printing, gravure printing, flexo printing, screen printing and combination printing and other commonly used printing processes.
Vacuum aluminized paper printing process
1. Offset Printing When the vacuum aluminized paper cigarette printing market is not mature, fast drying ink is the first choice, and its surface absorption is very small. Many companies use fast-drying inks, plus spray a lot of dusting, generally a large area of ​​the field requires two passes of printing, each printing about 500, but also had to add partitions to prevent anti-sticking. As a result, a large number of powder sprays have seriously affected the quality of printed products, coupled with slow printing speeds, and the control of ink and ink balance is difficult. It is only suitable for small-volume, small-size cigarette packs. The appearance of UV inks has completely solved the defects of offset printing. Because the UV ink is a green ink that crosslinks and cures by using the radiation energy of the ultraviolet light, it does not need to consider the quality problems caused by back dirt and dusting. Although using UV ink printing must use UV ink system, cold UV drying system, and the price of UV ink is more than ten times that of ordinary ink, to a certain extent, also affects the promotion of UV ink in cigarette packaging industry.
2. Gravure Printing In contrast to offset printing, gravure printing has an inherent advantage in printing cigarette packets, as evidenced by the smoke printing industry in Yunnan, China. Although the level of offset printing is good and the production cost is low, for the relatively large-volume printing industry, gravure printing is fast and efficient, suitable for printing large-area on-site and spot-color printing, and the color stability is better. It seems to have more advantages. The cost of producing a gravure printing plate is high, but its service life is also very long. The printing capacity is generally more than 1 million, which is more suitable for cigarette packaging with larger printing volume and stable hue. The gravure printing generally uses solvent ink, which is harmful to the body. With the improvement of human environmental awareness and the development of science and technology, some alcohol-soluble inks and water-soluble inks have replaced the original benzene-soluble inks, but it is necessary to promote them for a certain period of time. time. Another disadvantage of gravure printing is that it is difficult to reproduce the level of vacuum aluminum-plated paper on the Internet, so it is not suitable for printing large-scale network cables. 97 g/m2 soft bag vacuum aluminized paper is generally printed with gravure.
3. Flexo Printing Compared with the high plate-making cost of gravure plates, the cost of flexographic plates is much lower than that of gravure plates, and it has certain advantages for short plate printing. Flexo inks also use solvent inks. Flexo printing inks are widely used. In the industry of cigarette printing, there are few flexo applications. With the maturity of the flexographic technology and the in-depth development of the personalized market, flexo printing will increase in the vacuum aluminum coated cigarette pack printing.
4. Screen printing Screen printing also has a place in cigarette pack printing. Although the printing speed and market share of screen printing are far less than those of other printing methods, the ink layer thickness and printing effect of screen printing are unmatched by other printing methods. Wire mesh is particularly good at frosted and ice prints. It is more common in some high-grade cigarettes.
5. Combination printing With the development of the times, people's demands for cigarette printing have almost reached the harsh point. Some products require very high requirements, requiring not only 10% to 90% of dot reproduction levels, but also a large area of ​​stable color. To add some matte effect. If all these effects are to be performed well, it is not a printing scheme that can be accomplished. Two or three kinds of printing methods, offset printing, gravure printing, silk printing, etc., need to be completed in order to meet the requirements of customers. For example, due to its unique surface absorption and electrical conductivity, vacuum aluminum-plated paper cannot use electrostatic ink absorption during gravure printing process, and fine-grained dots are difficult to reproduce. Then we use the stronger dot-printing capabilities of offset printing to complete the process. Gravure is printed with offset printing to achieve the best results.
Vacuum aluminized paper printing
In the printing of all products, the requirements of cigarette printing are the highest. In addition to the special printing process, the requirements of smoke printing are strict, and the post-press processing is also particularly strict. Generally, the processes of stamping, embossing and die-cutting are used. Vacuum aluminized paper because it is a metal surface, so the general use of printed transparent yellow plus concave and convex instead of hot stamping, can reduce costs and can show results. Particular mention should be made of the stricter requirements for die-cutting on vacuum aluminized papers, because the aluminized layers are particularly thin, and special care must be taken when controlling the die cutter position. Pressure is very easy to cut through, violent, small pressure is cut constantly, even paper. The use of vacuum aluminum coated paper as the smoke wrapping paper has become more common and generally requires design, plate making, printing, hot stamping, embossing, die cutting, inspecting and packaging.
Source: Print Magazine No.6, 2005
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