Process Introduction

Screen printing, that is, screen printing, refers to the use of a screen as a plate base, and through the method of the photosensitive plate, using the screen printing plate graphic part of the mesh can be through the ink, the non-graphic part of the mesh can not be through the ink printing principle, made with the graphic screen printing plate.

Principle of screen printing

The basic principle of screen printing is: the use of screen printing plate graphic part of the mesh through ink, the basic principle of the non-graphic part of the mesh is not through ink printing.

When printing, ink is poured into one end of the screen printing plate, and a certain pressure is applied to the ink part of the screen printing plate with the scraper while moving towards the other end of the screen printing plate. The ink is squeezed by the scraper from the mesh of the graphic part to the substrate as it moves.

Due to the viscosity of the ink and imprinting fixed within a certain range, the printing process scraper and screen plate and substrate line contact, contact line with the scraper moving, because of the screen plate and substrate to maintain a certain gap between the printing screen plate through its tension and produce a reaction force on the scraper, the reaction force is called resilience.

Due to the action of resilience, the screen printing plate and substrate are only mobile line contact, and the other parts of the screen printing plate and the substrate is out of state.

The ink and screen fracture motion ensures printing precision and avoids dirty substrate. When the scraper is lifted after scraping the entire page, the screen plate is also lifted, and the ink is gently scraped back to the initial position, so that is a printing stroke.

Screen printing consists of five elements, screen printing plate, scraper, ink, printing table, and substrate.

The graphic accuracy of silk screen printing is lower than that of the photochemical method, but the process is simple, high production efficiency, low cost, and suitable for mass production of screen printed products with low requirements.

The advantages of silk screen printing

(1) Not limited by the size and shape of the substrate

General printing can only be carried out on a flat surface, but screen printing can not only be carried out on a flat surface but also on a special shape of the molding, such as a spherical surface. Anything with shape can be carried out by screen printing.

(2) The layout is soft and the printing pressure is small

The silkscreen is soft and elastic.

(3) The ink layer coverage is strong

It can be logo printed in white on all-black paper for a strong three-dimensional impression.

(4) Suitable for all types of ink

(5) Strong optical rotation resistance

Can make the screen print luster unchanged. (Temperature and daylight made no difference). This enables the printing of some self-adhesive, without additional coating and other processes.

(6) Flexible printing methods

(7) Plate making is convenient, cheap, and easy to master

(8) Strong adhesion

(9) Can be pure manual screen printing, also can be machine printing

(10) Suitable for long-term display, outdoor advertising is expressive

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