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UV ink is an environmentally friendly ink developed in recent years. In the context of industry printing vigorously promoting green printing , it is increasingly valued by printing companies. Although UV inks have many advantages, their popularity and application must also solve and improve the following problems.

1. High cost of use

On the one hand, UV inks are currently on a smaller market and have higher research costs, which makes the price of UV inks higher than conventional inks. On the other hand, UV inks must use special UV blankets, UV ink rollers and cleaning agents, which greatly increases their application cost. At the same time, UV curing equipment associated with UV inks is expensive. These make the use of UV inks very expensive.

2. Adhesion needs to be improved

During the curing process of the UV ink, the internal components are cross-linked and polymerized, and the volume changes instantaneously, resulting in a large internal stress. At this time, it is difficult for the UV light to penetrate the thick coating containing the pigment, which is likely to cause the UV ink to be incompletely cured. Poor adhesion. Although this problem can be improved by treating the surface of the substrate, the most fundamental solution is to develop a UV ink that has good adsorptivity, low shrinkage stress, and low cost.

3. Must develop suitable dampening solution

UV inks are essentially different from traditional inks, which can be used for non-absorbent substrates, and UV inks have different formulations depending on the substrate. Therefore, in offset printing , the required dampening solution has a certain adaptability and is matched with the UV ink to ensure the required printing quality.

4. Short shelf life

At present, UV inks have a short shelf life, mostly for about half a year. This is mainly because UV inks are easily gelatinized and deteriorated.

With the deepening of the green printing strategy, people's environmental protection requirements for inks and other consumables will gradually increase. UV inks will surely receive people's attention because of their environmental characteristics. Although they still have some problems to be solved, they still have some problems to be solved. It is gradually maturing, and we are expecting it to shine.

The above content is selected from the 8th issue of “ Printing Technology·Digital Printing Arts ” of Science and Technology Media in 2013. For more journal content, please pay attention to the journal channel. The latest journal content clicks into the electronic journal channel of Keyin.com.

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