What is screen printing technology? One printing technique uses a hand-engraved film or a photochemical plate to stretch a silk fabric, a synthetic fabric or a wire mesh onto a frame to make a screen printing plate. This printing technique is a screen printing technique. Screen printing technology is the most widely used in stencil printing. What is the difference between screen printing and other printing?
Compared to other printing technologies, screen printing technology has four major characteristics:
1. Adaptability
The three printing methods of lithography, embossing and gravure printing can generally only be carried out on a flat substrate. Screen printing can be printed not only on a flat surface, but also on substrates with curved, spherical and concave surfaces. On the other hand, screen printing can be printed not only on hard objects, but also on soft objects, without being limited by the texture of the substrate. In addition to this, in addition to direct printing, screen printing can also be printed by indirect printing method as needed, that is, screen printing on gelatin or silicone plate, and then transferred onto the substrate. Therefore, it can be said that screen printing is highly adaptable and has a wide range of applications.
2, large printing area
At present, the printing area of general offset printing, embossing and the like prints a maximum size of a full sheet size, which exceeds the full sheet size and is limited by mechanical equipment. Screen printing can be used for large-area printing. Today’s screen printing products can reach a maximum of 3 meters x 4 meters or even larger.
3, strong light resistance
Bright color Because screen printing has the characteristics of missing printing, it can use various inks and coatings, not only pastes, adhesives and various pigments, but also coarse particles. In addition, the screen printing ink is simple to prepare, for example, the light-resistant pigment can be directly placed in the ink, which is another major feature of screen printing. Screen printing products have great advantages in light resistance. It has been shown by practice that the offset is 1.4, the offset is 1.6, the gravure is 1.8, and the maximum density value of screen printing can be compared according to the range of maximum density values measured after using one black ink on the coated paper. Up to 2.0, the lightfastness of screen printing products is stronger than that of other types of printed products, and it is more suitable for advertising and signage outdoors.
4, the ink layer is thick, strong sense of three-dimensional
The texture of the rich offset and embossed ink layer is generally 5 microns, the gravure is about 12 microns, the flexographic (aniline) printed ink layer is 10 microns thick, and the screen printed ink layer thickness far exceeds the above ink. The thickness of the layer is generally up to about 30 microns. Thick screen printing for printed circuit boards with an ink layer thickness of up to 1000 microns. The Braille dots are printed with a foaming ink, and the thickness of the ink layer after foaming can reach 1300 μm. The screen printing ink layer is thick, the printing quality is rich, and the three-dimensional feeling is strong, which is incomparable with other printing methods. Screen printing can be done not only in monochrome, but also in color and screen color printing.
All of the above are the difference between screen printing and other printing, and also the characteristics and advantages of screen printing. Understand the characteristics of screen printing, in the selection of printing methods, you can develop strengths and avoid weaknesses, highlight the advantages of screen printing, in order to achieve a more ideal printing effect.