The characteristics and application of inventory sweeping process
Gold sweeping has its own unique advantages when compared with other imitation gold processing techniques in fine printing. As a widely used process, printing and bronzing have many advantages, but they are also inadequate. For example, at present, offset printing, gravure printing, flexo printing and silk printing can be used for printing gold, especially offset printing and gravure printing, which are relatively fast. The offset ink layer is thin and the metal gloss is not very good; although the gravure ink layer is thicker and the gloss is better than offset printing, the metal texture is not strong enough when printing on a large area, and the deformation is relatively serious when printing small prints and thin lines; A traditional process, the metal feel is also strong, but the energy consumption is high, the efficiency is relatively low, registration is difficult, small graphics and large area bronzing, the quality is not easy to control; although the matte printing has a better metal texture And gloss, but the production efficiency is low, and the waste packaging is not easy to recycle, which is not conducive to environmental protection. The gold sweeping technology has simple operation process, high production speed (up to 7500 sheets / hour) and low cost. Regardless of the thickness of the text, the size of the area can get better results.
The color of gold powder is also diverse, such as gold, silver, red gold, red copper, green, graphite, tan, lemon yellow, peacock blue, etc., it can be described as everything, and there are different particle sizes, which can show a rich color. . At present, North America and Europe have begun to popularize a kind of diamond-like gold powder. The gold powder has 4 particle sizes and 10 colors, which can make the decorative graphics appear like diamonds under the light, reflecting the colorful light. Unique effects. Due to the use of metal particles as raw materials, gold sweeping products have a more metallic grit feeling and light diffuse reflection effect, and are closer to the original texture of real metals. Gold sweeping products give people a distinct three-dimensional effect, feel smooth to the touch, and have a unique surface finishing effect, which is different from gold printing and bronzing. The gold sweeping process not only produces unique effects on the surface of the printed matter, but also plays a certain anti-counterfeiting function because it is difficult to imitate. Based on this, the gold sweeping process has attracted the favor of packaging users such as wine, cosmetics and pharmaceuticals.
Although gold sweeping technology has very obvious advantages, it is not perfect. The most important feature of gold sweeping is the formation of imitation gold effect in specific parts, but the single gold sweeping process is difficult to achieve the best metal gloss and texture at present. It is not as good as bronzing in some aspects. It is not as convenient as printing gold on printing sheets that need a large area of ​​imitation gold, and there is no advantage in effect. Therefore, gold sweeping is only a mid-range gold imitation effect processing technology, which has certain limitations, which limits its rapid development to a certain extent. The requirements for the environment of the gold sweeper are very high, the temperature should be controlled at 22 ~ 25 ℃, the humidity should be controlled at 50 ~ 55%, otherwise quality problems will easily occur.
In foreign countries, the application of gold sweeping is very common. Many printing plants adopt multi-shift working system, make full use of the new gold sweeping machine, and have achieved significant economic benefits. Today, the only company in the world that manufactures fully automatic gold sweeping machines is the German company Dreissig. Its latest model 2500 gold sweeping machine has passed the rigorous inspection of the official organization and obtained the CE safety certification. At present, it has been widely used all over the world. It solves the problem of dust pollution and increases the gold sweeping speed to nearly 8000 sheets / hour, or even close to 9000 sheets / hour. The gold sweeping process is widely used in the packaging of cigarettes, wine, cosmetics, chocolate, etc., as well as the printing of greeting cards and invitations, so that the value of the goods is further improved. The equipment has now been introduced to China by Jiuheng Printing and Packaging Equipment Company, a subsidiary of Sanjiu Group, and will push China's packaging and printing to a new level. Domestic users are mainly concentrated in cigarette labels, followed by medicine boxes and food packaging. South China and East China, which account for a considerable proportion of China's packaging and printing processing, also introduced several gold sweeping machines.
Compared with foreign countries, domestic manufacturers applying gold sweeping are rare. This may be because the country generally appreciates the sparkling bronzing effect more, and does not care much about gold sweeping closer to the color of the metal itself. In addition, some domestic printing companies are not very familiar with the gold sweeping technology. Many domestic manufacturers have not fully realized the fierce market competition, and the pressure has not been so great as to use gold sweeping processes to improve their packaging. Will not consider investing in this printing cost. At the same time, the deficiency of the gold sweeping technology itself is also an important reason. At present, in China, the gold sweeping market is not highly competitive and the price pressure is not great. In addition, gold sweeping products have unique anti-counterfeiting functions and advertising effects, allowing customers to accept price differences within a certain range; coupled with the relatively low cost of gold sweeping. Therefore, printing manufacturers can obtain higher profits.
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