Modelling of ink capacity of screen printing plates

Abstract

access to the quality education, adaptation and professional growth. The development of tactile sensitivity in children may compensate for the visual defect to some extent. In the process of the object perception based on touch and tactile sensitivity, children form their ideas about the shape, volume, size, texture and some properties of objects. They develop the skills of reading dotted Braille and relief images (drawings, pictures, diagrams). Different types of printing technologies are used to apply Braille in the production of educational and methodical, didactic materials, packaging and various types of non-publishing products. One of the most promising technologies for applying relief-dot images is the screen printing method, which allows one to apply thick ink layers. This increases the reliability and accuracy of reading Braille elements. The advantages of the screen technology are also the ability to print on a wide range of materials of different configurations and the ability to provide significant resistance of relief elements to mechanical impact during transportation and reading by the blind. The main element of the screen technology is the printing plate, which affects the amount of ink that can be transferred to the material to be printed. The maximum amount of ink that can be retained on a screen printing plate is called the ink capacity. The ink capacity is affected by the parameters of the mesh and the thickness of the copy layer. The main parameters of the printing plate and the printing process influence the height of the relief-dot images on the imprint. Based on the regression and correlation analysis, the influence of the main parameters of the printing plate (ink capacity, lineature, mesh wire diameter and plate thickness) is determined, which provides the required height of a Braille element on the imprint in the range of 100 μm or more.