Elastic slip in printing tasks under pressure

Abstract

In the printing industry, the most common are offset printing and flexography. These types of printing have inevitable distortions in the reproduced image. Constant, inevitable distortion occurs due to the slippage of elastic surfaces in the contact strip during the printing process. In order to solve this problem, a full-scale experiment was conducted on printing register marks using technology developed and patented by Techkon. The experiment was aimed at studying the distortions that can occur when the plate and offset cylinders come into contact. As the surface of the plate and offset cylinders of printing machines, a rigid metal mold and an offset rubber-fabric fabric, which is a textolite, were used. As a result of the experiment, it was discovered that the distortion on these surfaces causes permanent and inevitable deformation of the raster dot. To describe this deformation, the classical Hertz contact problem was used, which is a widely used model in the field of contact mechanics. By approximating the obtained numerical values, a simple equation was obtained. This equation is practically useful for engineering calculations that can be used to introduce pre-emphasis on a rasterized original file. This, in turn, allows you to achieve a more accurate reproduced image in terms of matching colors, shapes and sizes of small details. This is especially important when products require high color and detail accuracy to ensure aesthetic appeal and functionality. High quality is in demand in the production of decorative elements such as wallpaper, laminate, paintings, and security printing -banknotes, stamps, excise taxes..