What are the processes of concave and convex printing plate making

What are the processes of concave and convex printing plate making

With the continuous innovation and development of printing technology and the improvement of people's demand for printed matter, the printing process is constantly developing in the direction of personalization and customization. For printed matter, consumers often have high requirements, such as color, vision, and user experience. In order to make the printed matter rich in layering, the printing process is developed in the concave and convex printing plate-making process. The Printing Bazaar will briefly describe the process of concave and convex printing plate making. Embossing printing is a special printing process that does not use ink in the scope of plate printing. On the printed matter printed with graphics and texts, two plates of concave and convex plates are made according to its graphics and texts, and then embossed with a flattening printing machine, so that the surface of the printed matter is shaped like a relief, producing a unique artistic effect. Therefore, it is also called "rolling concave and convex", and this method is similar to "arch flower". The process flow of embossing printing is as follows: the production of embossing plates → embossing of embossing. First, the production of concave and convex printing plate first distinguish the primary and secondary levels of the drawing, to the main performance of the theme, the use of shallow levels, to reach a certain depth, and then consider the secondary level, the prominent main part to make the height of the protrusion higher. The printing plate is first made into intaglio and carried out by engraving process, which can be woodcut, copper, steel, etching; Secondly, determine the expression method of graphics and lines, the main body and the general level should be coordinated, the depth of the layout should be coordinated with the shallow, the outline of a picture should be from shallow to deep, and there is a certain slope, and the engraving surface is the use of perspective principles and near-far-shallow and other expression techniques; Finally, after completing the outline engraving, the fine work is carried out to make the whole layout smooth and even. The engraved gravure is glued to the center of the metal bottom plate of the flat flat printing machine, and the printing plate is leveled to prevent the pressure from being unbalanced, and the pressure is not real or the phenomenon of going to the plate, the yellow board paper is glued on the embossing plate, the pressure should be corrected, and the parts with more levels of concave and convex contours are different according to the different depths, and the yellow board paper is cut into a piece of paper according to the size of the printing surface, forming the same trapezoidal punch as the gravure plate, the details of the trapezoidal punch are not consistent with the gravure plate, and a layer of gypsum slurry is laid on the trapezoidal punch, and the gypsum slurry is mixed with fine gypsum powder and glued into itThe consistency should be appropriate, cover the gypsum slurry with a thin piece of paper, and test the concave and convex pressure when the gypsum will be dry, in order to prevent the gypsum from sticking, you can brush a layer of kerosene on the gravure plate. It is used to gently shake the machine during the pressure test, and the speed should be slow at the beginning to avoid the rapid spread of the gypsum layer and the formation of gravure and letterpress inconsistency. After the plaster is dried and hardened, it can be embossed at normal speed. If the first pressed pattern does not meet the quality requirements, the gypsum layer needs to be repaired, and the excess plaster on the non-embossed surface is scraped off with a knife when the plaster is not yet dry and hard. 2. Embossing of the concave and convex plate When printing, the printed matter is placed between the gravure and the letterpress, and the concave and convex figure can be rolled out by applying greater pressure. In the process of embossing, if the pressure is too heavy or the concave and convex is too deep to cause the paper to be damaged, it can be ground evenly with sandpaper on the gypsum surface, and the concave and convex plate should be brushed frequently in the embossing to prevent dirt from being pressed into the damaged printing surface. By briefly describing the process of embossing and plate-making through the printing market, have you learned the powerful ability of the embossing printing and plate-making process? In fact, every printing and plate-making process has its own places that cannot be completely replaced. If you also have similar printing needs, you can enter the Printing Market Business Channel, and we will recommend the most suitable printing shop for you.