Offset printing, also known as offset printing, is one of the most widely used printing methods in the printing field. The graphic and non graphic parts of offset printing are basically on the same plane, with only the difference in height, and are printed using the principle of repelling oil and water. The graphic part is hydrophobic (ink-loving), and the non-graphic part is hydrophilic (repelling ink). When printing, first moisten the non-image part with fountain solution. The image and text part repels the plate liquid; then the ink roller transfers the ink, and the image and text part accepts ink, rather than the image and text part repels ink; the ink in the image and text part is transferred to the rubber roller, and then transferred to the substrate, which belongs to indirect printing. Next, UV curing lamp manufacturers explain the characteristics of offset printing:
1. The thickness of the ink is very thin, generally the thickness of a single color of offset printing ink is about 2μm;
2. Since the oil roller and the water roller are in contact with the printing plate alternately, the printing suitability of the ink is very high, and the emulsification of the ink should be prevented at the same time;
3. The printing speed of offset printing is very fast, generally one hundred to four hundred m/min;
4. Offset printing ink has high viscosity, high pigment concentration and high tinting strength;
5. High overprinting accuracy (low pressure), good graphics and text reproducibility, clear dots, and full layers.
According to the characteristics of offset printing, the formulation design of uv offset printing ink should consider the good water resistance of oligomers and reactive diluents. During the printing process, the ink roller and the water roller will not colloid contact, leading to emulsification. The pigment concentration in uv offset printing ink should be high. In order to better disperse pigments, polyester acrylate is usually used as the main resin component with good pigment dispersion; due to the fast offset printing speed, oligomers and reactive diluents should be resins with fast curing speed and high functionality.
According to the characteristics of offset printing, Height-LED overcomes the problems of high offset printing speed, small space of individual machines, and long illumination distance. It not only increases the optical power that meets the drying of offset printing, but also effectively reduces the investment cost of equipment. Make uvled light curing equipment truly enter the offset printing industry.
Shenzhen Height-LED specializes in the production of uvled curing equipment, and can customize suitable uvled curing systems for customers. Welcome to consult.
