Reasons why companies can't refuse to use UV technology

Improve product performance

UV printing has a good printability for a wide range of substrates. The actual UV print outlets are clear, the tone reproduction is good, the ink is bright and bright, and the printing consistency is high. At the same time, since the UV curing process is a photochemical reaction process, both the ink layer and the optical oil layer have the advantages of strong adhesion, strong durability, and resistance to water, chemicals, wear, and aging.

Increase productivity

Due to the light curing method, no heat source or solvent is needed, and the curing time is very short. The general UV process can achieve a line speed of 400 meters/minute, which can greatly improve the production efficiency. UV ink printing followed by UV glazing machine processing, obtained print gloss, and the surface smooth and uniform. After coating with the machine, the packaging and processing processes such as die cutting, creasing, gluing, and bronzing can be completed immediately, which is very beneficial to the needs of high-speed printing development.

Environmental standards

The entire curing system for UV printing is a solvent-free system, that is, a 100% solvent-free formula, and it does not contain VOC, which is precisely adapted to today's environmental requirements. This is another important feature of UV-curing inks. Because UV inks have a solid content of nearly 100% after solidification, they contain almost no VOCs (organic volatiles), that is, organic compounds that do not or rarely emit volatile compounds during curing. It will not cause more harmful environmental pollution, but also less waste, and save energy, but also do not have to worry about dealing with harmful flammable and explosive materials, it is an environmentally friendly ink.

Improve economic efficiency

High production efficiency and high output mean high economic efficiency. At the same time, high speed means that it can reduce the storage costs and financial pressure of raw materials and finished products. At the same time, due to the low energy consumption of UV curing, this has led to a substantial reduction in the usual operating costs.

Designing plate

The design draft for producing UV printing has very high requirements on the output format. For example, the front-side or back-scan of the film, the number of output lines, the angle of the screen, etc. must be noticed in the prepress stage.

Adhesion

Due to the poor penetration properties of substrates such as plastic sheets or gold/silver cardboard, the adsorption of UV inks is weak, resulting in poor printing quality and requiring surface treatment of the materials in advance. In addition to providing bright, bright colors, UV-curable inks also have strong anti-friction properties. The chemical substance in the UV ink forms a polymer three-dimensional network polymer through a cross-linking reaction. Therefore, the use of the UV ink can make the ink layer of the ink product strong, fast-drying and cross-linked. Such ink layer has a high abrasion resistance. And chemical resistance. Many of the prints printed on the coated paper by the uv ink for direct mailing can withstand multiple folds and can withstand strong radiation upon re-laser printing, so the UV ink can be used for overwrap printing requiring wear.

Ink emulsification

UV ink ink balance tolerance is very narrow, easy to cause ink emulsification, dirty version during printing, affect the printing quality, so need to properly reduce the printing speed, but compared to the ordinary printing speed is still quite high.

Curing degree

In order to improve the color saturation of the printed matter, when performing UV printing, the printing pressure is larger, the ink layer is thicker, and the dots are increased so that the UV ink is not easily cured. In this case, the degree of curing must be controlled by appropriately reducing the printing speed. Since UV inks only dry when irradiated with ultraviolet light, even if the ink is stored in the ink fountain for a long period of time, the performance of the ink can be kept stable, and no crusting on the ink roller will occur. Once exposed to UV light, the ink can be instantaneously dry and thorough. Its curing time is very short. Generally, only 1/10S can be completely dried and fixed on the surface of the substrate. For traditional thermosetting inks and sheetfed papers. Offset printing inks, the drying time may take several minutes or even several days to completely dry, so the use of UV curing ink printing jobs, delivery time is short, can be comparable with flexo, gravure, and greatly enhance the printing production efficiency .

Color order arrangement

UV offset color arrangement problem is more complicated. Due to the limitation of inking principle, the ink layer on the substrate is relatively thin. When a relatively thick ink layer is needed, it is difficult for the printed material to achieve the intended reproduction effect. Therefore, it is necessary to change the color sequence according to the specific circumstances, first printing a small amount of ink, after printing a large amount of black ink, so that you can get the highest amount of ink, more full color.

Print registration

UV offset printing When UV ink irradiation is used to cure the ink, the main problem caused by the curing is that the substrate is thermally expanded, resulting in inaccurate overprinting. This is inconsistent with the UV ink curing because the UV curing requires a longer irradiation time for the ink, and the printing sleeve criteria requires a shorter UV lamp irradiation time. At this time, it is necessary to perform UV curing after the last color is printed. In this way, even if the substrate swells, the substrate can be deformed to a minimum by lowering the temperature for a period of time. Under special circumstances, the middle color group can also be exposed to UV light, but the shorter the irradiation time, the better. Or you can use cold UV technology.