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UV ink curing device what are the steps?
UV offset printing clear, good quality, and short production cycle, high production capacity. However, because of the label UV printing process is more complex, and the application time is not long, in the application of label printing craft still need to continue to sum up, to see the shortcomings of UV offset, continue to be improved.
Steps / methods
The curing device 1, UV
As a result of UV curing ink on light induced absorption of UV radiation agent after Inimer and prepolymer polymerization and cross-linking reaction to produce curing. It must be installed offset UV UV lamp. General printing machine installation of 3 ~ 6 UV lamp and exhaust pipe. UV UV lamp must adopt suitable wavelength, usually 200 ~ 450nm range, and good control of the distance and irradiation. In addition, the spotlight is also provided. In the same lamp, the lamp shade of the good or bad, will make the efficiency of a lot of difference. Under the ultraviolet lamp illumination, the air has the ozone generation, therefore needs to have the exhaust pipe and so on the ventilation equipment. UV lamp will be used for a certain period of time will be aging, energy weakened, it is generally in the life of 1000 hours or so. Therefore, in the usual printing should pay attention to the light of the UV lamp, dust will wipe clean. UV lamp used to remember the time. More than the use of time to pay attention to the detection of UV ink curing fastness, in order to replace the UV tube in a timely manner. UV light on the human body has a certain damage, it is necessary to take the shading measures.
2, the use of UV ink
Some of the ingredients in the UV ink contact the skin will produce a stimulating effect, or even cause skin allergic reaction. Therefore, to avoid contact with skin and ink in use, such as wear gloves or wash. UV ink and ordinary ink exchange if printing on one machine, then we must set the rollers and all turing. If the ordinary ink must not clean will affect UV curing ink drying. Innovativeink AIDS cannot use special auxiliary materials must be used, and UV ink matching.
3, adhesion
Because of the plastic sheet, foil substrate Permealbe, adsorption on the ink is very weak. So in order to make UV ink on the non absorbent material attachment fastness improving, UV offset requirements the surface of the substrate in or 40dyn.