A printing blanket is a rubber-covered mat used in offset printing to transfer an image from the printing plate onto the substrate, such as paper or cardboard. It helps ensure even ink distribution and consistent print quality by cushioning the pressure between the printing plate and the substrate.

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

A squeegee would be used in screen printing to force ink through the printing screen and onto the substrate. It can also be used in cleaning, to remove the cleaning fluid or water from a flat surface.

The different types of block printing include relief printing, where the design is carved into a block and then inked to transfer the design onto the substrate; intaglio printing, where the design is incised or etched into the block; and screen printing, where a stencil is used to transfer the design through a screen onto the substrate.

Reason: the choice of ink or ink itself has quality problems; The ink is too fast so that the printing pattern or line is not clear, the pattern is incomplete or the line is broken; The viscosity of the ink is too high, and the pattern is incomplete or the line is broken when printing.

The printing plate blocking phenomenon affects the normal ink; Insufficient or uneven pressure of scraper during printing results in uneven ink; The printing surface of the substrate is uneven.

Solution: replace the appropriate ink; Use slower drying solvent to prepare ink; Dilute ink or add the thixotropic agent to reduce viscosity; Correct choice of slow dry solvent dilution ink, and pay attention to the printing screen ink performance;

Increase the force of the scraper when printing, and pay attention to the uniformity of the scraping force; Processing substrate surface (such as printing coarse grain substrate can first use up oil or other materials before printing).