Print glazing and other

As a method of surface finishing of printed products, glazing has been favored by printing users in recent years. The reason is that a thin and uniform transparent and bright layer formed on the surface of printed matter after being coated with a colorless and transparent coating on the surface of the printed matter can effectively improve the surface properties of the printed matter, and can not only enhance the printability. The glossiness of the surface makes the printed matter or packaged product more visible on the shelf, and adds value to the product, which can protect the printed material from moisture and corrosion. The special gloss effect caused by the gold, silver and pearlescent glazing process, the surface three-dimensional effect brought by the foam coating, and the olfactory feeling brought by the scent coating to match the visual impact make the glazing process more extensive .

One kind of polishing process

The glazing process can be divided into off-line glazing and on-line glazing according to its processing method. Off-line glazing, namely printing and glazing, are carried out on special machines, and special glazing machines or calenders are required for glazing. For some folding carton manufacturers, off-line glazing is a very good choice not only because it can obtain higher gloss than on-line glazing, but also because of its high flexibility and equipment. Small investment. However, off-line glazing systems have increased transport efficiency between printing and glazing operations, so most off-line glazing has lower production efficiency than on-line light.

After the glazing unit is connected to the printing unit, the printing and coating are completed once. Current offset presses, gravure presses, and some screen printers can all accomplish this. No additional special glazing equipment is required, which not only improves work efficiency, but also overcomes various types of quality failures caused by offset printing and dusting. Therefore, on-line coating has become an attractive glazing solution. However, on-line coating has high requirements for coating technology, coating oil, drying equipment and coating equipment.
And the glazing part of the printing press is several times more expensive than the stand-alone glazing unit.

Two advantages and disadvantages of offline

Compared with online coating, the advantages of offline coating mainly include the following points:

(1) The glazing effect is better and the print is more beautiful.
(2) The products after polishing are more resistant to abrasion and corrosion.
(3) Wide choice of UV oils, great flexibility and low production costs.
(4) The cost of the equipment is low, so the user's capital investment is much less.
(5) The glazing technology is easy to grasp, and less waste of paper is required.
However, the off-line glazing covers a large area and the working efficiency is lower than on-line glazing.

As for the choice of online coating or offline glazing, it is recommended that you have to decide according to the actual situation of the user, because the online coating and the tax machine glazing have their own strengths, but also have their own short, which kind of glazing method to choose, The economic status of an enterprise is a factor that must be taken into consideration. The existing configuration of a company and the products that need to be processed cannot be ignored.

The scope of application of three coating technologies

At present, the actual application of polishing technology prints are: gold and silver cardboard, packaging boxes, stickers, gift surface printing cover, outdoor billboards, circuit boards, color newspapers, etc., in particular, a variety of external packaging boxes such as food, Medicines, hardware, cigarettes, cosmetics, etc. In addition, the glazing technology is used more often on the cover of books and magazines, and on corporate publicity samples. Not only the overall glazing of printed materials but also the partial glazing of printed materials.

With China's accession to the WTO, more and more attention is now being paid to the protection of the environment. In the past, many paper-laminated products were gradually replaced by glazing technology, especially for export packaging, all of which are used to improve the gloss of the packaging. , Wear resistance, moisture resistance, and corrosion resistance.

Four offline polishing equipment

The glazing process can significantly improve the quality of printed materials, and it also brings higher added value for printed materials. Therefore, the post-press processing technology of printed materials is flourishing in China and the corresponding glazing equipment is also developing. Rapid, wide variety. As far as product category, usage effect and market share are concerned, Sino-German Group's Warwick products are more popular. The company is a specialized manufacturer of coating equipment for R&D and manufacturing. Now it has developed two series of more than ten products. The glazing equipment for each variety is manual, fully automatic, partially glazed, fully glazed, and glazing equipment designed for thin paper (80 g/cm2). . RHW-1000/1200 UV full-automatic polishing machine is widely used in China's major printing plants. This machine is a high-tech product that integrates machine, electricity, and gas. It can also be used for thick and thin paper to achieve full automation of the process. , High-efficiency, using frequency conversion stepless speed regulation, maximum speed up to 80M/min, each Workstation has independent space, customers can carry out on-line combination equipment according to their own needs.

Warwick's glazing equipment is generally high in stability and durable. In particular, the quality of its glazing products is very high and it is praised by customers. Not only does it have a high market share in the domestic market, but one-third of its products are exported overseas. Among the machine industry, export earned the fifth place.

Five Coating Technology Development Prospects

Since the invention of coating technology in the 1960s, it has been widely used by the end of the 20th century. UV glazing of paper products in China is growing at a rate of more than 20%. Its development prospects are very spectacular.

At present, prepress and printing have been digitized and have entered the digital age. However, post-press processing and paper finishing are still lagging behind. A considerable number of them still remain on the basis of manual feeding, or have a single function, and are not only inefficient. , And product quality is not high, therefore, the entire post-press processing to break through the constraints of ideas and technology, according to digital printing and market requirements for the rapid development of post-glazing technology, toward the intelligent, automatic, multi-type direction.

Source: China Yinguang

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