UV ink development abroad

    Foreign UV ink developed very rapidly in the United States, UV inks offset market is the largest, accounting for about 40% of the share. Followed by screen printing (30%), in the last century 90's particularly strong growth, becoming the first choice for optical disc manufacturing technologies. European UV ink products in 2000 totaled 20,500 tons. UV inks market in Asia than in Europe and the Americas, to its late start, but the growth rate is not low. In Asian countries, Japan has the largest market share.

    The development of the domestic UV inks

    UV ink domestic market despite a late start, but in recent years as the domestic economy has sustained rapid growth and prosperous situation. According to the China Institute of Radiation Curing Photosensitive Professional Committee of the incomplete statistics, in 2003 UV ink output reached 6514 tons, representing 64.2 percent growth in 2002, output value of 441.31 million yuan, representing 55.7 percent growth in 2002. Among them, UV offset printing ink, optical imaging resist ink, optical imaging Solder inks, printing ink, such as CD-ROM production of high-grade printing ink have been greatly increased. Because of the lower starting point of the UV inks, and UV ink was optimistic about the industry are, therefore, domestic UV ink will be better market prospects for the next few years will be achieved rapid development.

     Reverse polish

     At home, UV printing major substrates of non-absorbent materials. In Europe and America, printing companies make use of co-curing process not only with the traditional UV ink printing the same quality of Indian goods, and not only have to meet their high-gloss mirror effect or transparent effect, the further improvement of this process in order to higher contrast printing. To this end, developed a known as "reverse polish process" of the early version, but at that time, due to some unresolved details, such as adhesion, it has not really implemented. After several years of perfect, this process has matured. Here use this technology for the local polishing process.

     Reverse polish (Pro-Cure) is compared with the traditional purposes of partial glazing. The past, no matter which way polishing (Flexo printing, screen printing or gravure printing) for the local polishing, final polishing process it is essential to adopt local polish printing in order to achieve the local high-contrast graphic effects, so , polish and precision printing set to become the key to polishing process.

     Technological breakthroughs and the reverse polish the above-mentioned law, so that registration problems solved, the process is as follows.

     Polishing before the completion of conventional printing, and determine the ink has been completely dry or cure; and then to online or offline mode script will design parts of the non-high-light the way to offset printed on the reverse transparent ink; re-connect to full version of the way in the printing UV varnished surface coating and curing. At this point, varnished and reverse polish contact the Mexican region cohesive response to the formation of small granular ink film, reverse the formation of mirror polishing regions. Clearly, the use of reverse polish process, the same printed materials will be at the same time the existence of high-light and non-high-light effects. Moreover, because the non-high-light position is offset, overprint precision, but also to ensure a high-light some graphic precision.

   A total of UV curing technology

     To improve the UV printing technology, the German manufacturer of UV systems cater Grafix Christie (INX) ink UV co-developed a new technology co-curing. The process is to use a new ink technology, break with tradition and ordinary ink UV ink can not be compatible with the difficulties, coupled with the high power UV curing device improves the quality of UV-curable ink, UV printing solved some problems, but reduced access to special printing printing technology threshold.

     UV characteristics of co-curing process is as follows:

     (1) General cleaning agent can be used to clean and wash the shorter hours, to avoid the printing process of the problem of excessive downtime.

     (2) ordinary share ink printing ink curing time required for inter-conversion and ordinary ink printing ink for the same period of time, and easy to use.

     (3) co-curing ink in the printing ink in the balance of tolerance and common offset the same ink. Therefore, ink emulsification, dirty version of such issues will be easy to control, printing to improve the quality of stability.

     (4) printing dots more than ordinary UV printing sharp, printing ink particles delicate membrane surface, and has a color transparency effects.

     (5) co-curing UV inks do not require expensive dedicated roller.

     (6) between ink overprint of excellent, just a group of middle-Block curing overprint can strengthen the effect of reducing the hardware investment.