The most popular green ink

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The development of UV ink abroad is very fast. In the United States, the largest market for UV ink is offset printing, accounting for about 40% of the market. The second is silk printing (accounting for 30%), which grew strongly in the 1990s and became one of the preferred technologies for optical disk manufacturing. UV ink products in Europe totaled 20500 tons in 2000. Compared with Europe and America, Asian UV ink market started late, but the growth rate is not low. Among Asian countries, Japan has the largest market share

development of domestic UV inks

although the domestic UV ink market started late, it has shown a thriving situation in recent years with the sustained and rapid growth of the domestic economy. According to incomplete statistics of the radiation curing Professional Committee of the Chinese Photographic Society, the output of UV ink in 2003 reached 6514 tons, an increase of 64.2% over 2002, and the output value was 44.131 million yuan, an increase of 55.7% over 2002. Among them, the output of offset UV ink, photo imaging anti-corrosion ink, photo imaging solder resist ink, CD ink and other high-grade inks has increased significantly. As the starting point of domestic UV ink is low, and UV ink is favored by the industry, domestic UV ink will have a good market prospect and will achieve rapid development in the next few years

reverse glazing

in China, the main substrate for UV printing is non absorbent materials. In Europe and the United States, printing manufacturers not only use the co curing process to print prints of the same quality as the traditional UV ink, but also do not meet its only high gloss mirror effect or transparent effect. They further improved this process to achieve higher printing contrast. For this reason, an initial version called "reverse glazing process" was developed, but it was not really implemented at that time because some details, such as adhesion, could not be solved. After several years of improvement, this process has become more and more mature. The following describes the local glazing process using this technology

Pro cure is relative to traditional local polish. In the past, no matter what glazing method (flexo printing, printing or gravure printing) was used for local glazing, the last glazing process must use local glazing printing to achieve high contrast effect of local graphics and text. Therefore, the overprint accuracy of glazing and printing became the key to the glazing process

the reverse glazing process breaks the above laws and solves the registration problem. The process flow is as follows

the development strategy of one body and two wings must be realized before glazing. Conventional printing must be completed first, and the ink must be completely dried or cured; Then, the non bright parts of the design draft are offset printed with transparent reverse ink in the way of online or offline; Then connect the wires, apply UV varnish on the printing surface in a full plate manner and cure it

at this time, the contact area between the varnish and the reverse glazing ink generates cohesion reaction to form a small granular ink film, and the reverse glazing area forms a mirror

obviously, if the reverse glazing process is adopted, there will be both highlight and non highlight effects on the same print. Moreover, because the non high light part is offset printing, the overprint is accurate, and the accuracy of the high light part of the picture and text is also guaranteed

uv co curing process

in order to improve the UV printing process, the German UV system manufacturer Grafix cooperated with inks Inc. to jointly develop a new UV co curing process. This process uses a new ink technology to break the incompatibility between traditional UV ink and ordinary ink. In combination with high-power UV curing device, it improves the curing quality of UV ink, solves some problems in UV printing, and reduces the technical threshold for printers to enter the special printing field in China, which is still in the deep development stage of industrialization, information, urbanization, marketization and internationalization

uv co curing process has the following characteristics:

(1) it can be cleaned with general cleaning agent, and the cleaning time is short, avoiding the problem of long downtime in the printing process

(2) the conversion time between common ink printing and co curing ink printing is the same as that of common ink printing, and the operation is simple

(3) the water ink balance tolerance of CO curing ink in printing is the same as that of common offset ink. Therefore, it is easy to control the problems of ink emulsification and dirty version, and the stability of printing quality is improved

(4) the printing point is sharper than ordinary UV printing, and the surface particles of the printing ink film are fine and transparent

(5) Co curing ink does not need expensive UV special cots

(6) excellent overprint between inks. Only one set of intermediate seats is needed to solidify to enhance the overprint effect and reduce the hardware investment

recently, according to the introduction of eastaer's agent in China, the UV prepolymer (oligomer) er-7800u distributed in the domestic UV market has attracted wide attention and attention from the industry! And the sales are very good. Especially on the surface of plastic and metal materials, the performance is more outstanding and excellent, which is loved by engineering technicians and experts in the industry:

(1) high yellowing resistance. (better than all PUA constant yellow series on the market)

(2). Low shrinkage above 300Hz becomes an ultra-high frequency fatigue testing machine with high hardness

(3), high fullness and gloss

(4) prevent UV baking cracking

(5) low viscosity also faces many tedious work and low stimulation

(5) optimize and reduce the cost of coating formulation

er-7800u can be used as the main resin of uvpaint and ink, and can also be used as a formula to adjust the resin performance and reduce the formula cost. Widely used in, electronics, electrical appliances, motorcycles, optical discs, metals UV covering and protective coating for the surface

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