Introduction
UV coating technology is applied to the surface of the paper with a layer of UV oil through a blanket, and then the film or special pattern is transferred to the printing paper through the roller. The effect of the laser beam on the surface of the paper is produced. This technology is widely used in cigarette cases, wine boxes, cosmetics, pharmaceuticals and the like. In the current industry is an emerging anti-counterfeiting technology.
Principle
Gold and silver cardboard is mainly composed of five major elements, namely screen printing plate, squeegee, ink, printing table and substrate.
The basic principle of screen printing is to use the basic principle of the screen printing part of the mesh to penetrate the ink, the non-image part of the mesh is not transparent to the printing. The ink is poured on one end of the screen printing plate during printing, and a certain pressure is applied to the ink portion on the screen printing plate by the squeegee blade while moving toward the other end of the screen printing plate. The ink is squeezed from the mesh of the graphic portion onto the substrate by the squeegee during movement. Due to the viscous action of the ink, the imprint is fixed within a certain range. During the printing process, the squeegee is always in line contact with the screen printing plate and the substrate, and the contact line moves with the movement of the squeegee due to the screen printing plate and the substrate. A certain gap is maintained between them, so that the screen printing plate at the time of printing generates a reaction force against the squeegee by its own tension, and this reaction force is called a resilience force. Due to the resilience, the screen printing plate and the substrate are only in a moving line contact, and the other portions of the screen printing plate are separated from the substrate. The ink and the screen are broken and the printing is ensured to ensure the dimensional accuracy and avoid the dirty substrate. When the squeegee scrapes across the entire layout, it is lifted, and the screen plate is lifted, and the ink is gently scraped back to the original position.
The main purpose
It is widely used in color printing and packaging, and is suitable for box making and box printing and printing of cigarettes, alcohol, food, cosmetics, toothpaste boxes, medicine and gift packaging.
