UV Polishing Adds Light to Prints (Part 2)

Partial UV coating refers to the printing of UV varnish on a pattern of an original color print. After finishing the UV varnish, this varnishing pattern is compared with the surrounding printing effect. The glazing pattern looks bright, bright and three-dimensional. UV glazing can increase the added value of goods. Stimulate consumers' desire to buy and keep the cover for a long time. Can meet the special needs of printed materials or post-processing.

Some local UV coaters are listed below:

1. Trin Machinery's high-speed UV spot coater USTSR-102. The machine has strong flexibility, and the transfer time is fast during the operation. The paper feeding and the white moving delivery are completely in line with the advanced sheet-fed printing machine. The operation is convenient and fast, and it is suitable for the polishing of the long version and the short version. The bite paper transport is also suitable for the coating of thick paper and thin paper, belonging to the printing machine line outside the light system; a new generation of local coating machine USTAR-102 type unit design. Emphasizes the product's high brightness and high quality; its double oil head structure. One is powder, the other is UV polishing, and one job is completed. It can maintain the whiteness of the paper, increase the UV adhesion, and increase the quality of the printed sample. The new USTAR-102, a change of the traditional local polishing machine (Model: The structure of USTAR-36) revolutionizes the mechanics of the fuselage, gears, lubrication, and electrical automation. Makes the entire machine stand the test of high-speed operation for the company to create high-profit products.

2. LG's full-automatic, fast, uV, dual-use, localized glossing machine. The aircraft is characterized by a stable performance. Low noise, fast and accurate with the product of local glazing: 2 do not have to force squeezing "does not hurt the rubber wheel. The uniform thickness of the UV oil can be controlled to achieve a completely oil-free tire; 3 reverse rotation can naturally remove the printing dust on the paper and return to the oil drum to precipitate, with the effect of removing powder 4 can increase with a green water-based coating Group selection is equipped with infrared combination, more prominent features of a machine with more use.

3, the company's UV polishing products. The financial high-speed UV high-speed spot coater applies the pendulum-feeding method to feed paper, which can quickly feed paper up to 6600 sheets per hour. Equipped with mesh belt UV drying method, it has the advantages of high machine speed, accurate positioning, high UV drying efficiency, and low energy consumption.

4. The company's UV glazing series of products “The UV partial glazing machine adopts an enclosed web design with bite-paper transfer structure of offset printing machine. Full use of the large-diameter impression cylinder thickness paper can fully do UV . Can also do partial UV.

5. “Warwick” brand RHWJ-UV automatic high-speed local coating machine of Ruian Huawei Printing Machinery Co., Ltd. Use double diameter rollers and transfer rollers. To improve the speed of glazing and print quality. Swing oscillator reduces vibration and improves stability. At the same time using the chamber type ink knife system to improve the uniformity of the oil. The whole machine is controlled by PLC plus human machine interface, which improves safety and reliability. This is to improve the product's grade. The surface of the glazing product that has been made has a three-dimensional appearance, a clear hierarchy, and high precision.

Comprehensive UV coating refers to the printing of UV varnish on top of the original color prints. The “UV full polisher” manufactured and manufactured by Taiwan Choi Machinery Co., Ltd. is composed of modules for feeding, powder removal, base oil, infrared drying, uv coating, uv drying, and paper collection. Need to be combined.

UV light source

When using a UV light source, it should be noted that the workshop should have good ventilation, because UV light source will produce ozone, body long-term inhalation of ozone, can cause respiratory mucosal lesions. After installation, ozone should be discharged outside the workshop. In addition. Strong ultraviolet light damages the eyes and skin. The emitted light is stronger than that of the electric welding machine. Generally, the reflected ultraviolet light is not blue. However, long-term fixation can also damage the eyes. In addition, lamps that exceed the normal use time must be replaced promptly. Otherwise, the UV oil does not dry well.

Varnish

Polishing Varnish can be roughly divided into three categories: Oily Varnish, Waterborne Varnish and UV Varnish. Comprehensive consideration of environmental protection, impact on human health and user-friendly operation of the convenience and low cost and other factors. The use of oily glazing will be reduced. Water-based varnishes and UV varnishes will gain more market share.

The quality of printed products depends largely on coating oil. Whether it is UV coating, waterborne coating, ordinary coating or polishing, each has its own advantages and disadvantages. It has a certain market demand, but Waterborne glazing is undoubtedly the most advantageous.

Currently. In developed countries, waterborne glazing has become the mainstream of glazing technology. Paper surface treated with water-based varnish is either light or dark. All can be post-processed, such as local finishing, bronzing, gold sweeping and embossing, etc.

According to different printing materials, UV varnish can be divided into special varnish, such as thin paper, thick paper, plastic, gold and silver cardboard. It is not allowed to add thinner when using UV varnish. Otherwise, the printed product will not reach the desired gloss. In the actual use of the process. UV Varnish cannot be used at room temperature. Must be heated to 50 before use. In addition UV light oil has irritation to the skin. If UV oil splashes on the skin. Wash it with soap as soon as possible. UV oil storage temperature should be above 5 °C, to avoid direct light.

market expectation

With the increasing standard of living of people. Our country has higher and higher requirements for the quality of packaged printing products. UV glazing is a beautician of packaging products. Bright packaging products. Can attract consumers' attention. Increased sales of manufacturers. therefore. UV glazing naturally becomes an indispensable process link for printing plants, according to statistics. Market demand for UV polishing is about 30% to 40% per year.

Overall, China's packaging and printing market is huge. However, the packaging printing capacity and its technology are relatively weak. It is believed that with the gradual improvement of China's printing technology capabilities, it will inevitably lead to the corresponding development of packaging and printing technology.

At present, the application of coating technology has gone far beyond the traditional publishing, printing, packaging and printing industry. It can not only coat gravure printing presses, offset printing presses, coating machines, and screen printing presses on paper prints. In addition, it can also be applied to the coating of mobile phones, decorative materials, and PVC plates by spray coating. The market for polishing coating technology is promising.

Glossing trends

Traditional glazing methods are sent to the glazing factory for glazing after the printed matter is printed. Therefore, it is impossible to meet the requirements for high-efficiency printing time. In the printing process. In order to prevent anti-printing and use of dusting. This has some impact on the quality of glazing processing. It also takes into account handling time and costs, etc. From the perspective of cost, it is uneconomical to install a set of glazing equipment in the final printing unit of the printing press. The connection of light that is printed and finished at the same time is one of the development trends of coating.

In addition. Most of the packaging and printing industry can develop UV coating. UV-printed prints have high surface gloss and abrasion resistance, but UV-curing coatings use hazardous monomers. It will cause pollution to the environment. Like cosmetics, foods and other products that have a direct relationship with the human body. UV coating cannot be used at present.

Therefore, in order to further expand the application of glazing. Must reduce the cost of waterborne varnishes. This will make it possible for all printers to produce low-cost, environmentally friendly and safe printed packaging products.

Source: China Metal Products Network