1 printing adaptability. The three printing methods of lithography, gravure and embossing generally only print on flat substrates, while screen printing can not only print on flat surfaces, but also print on curved, spherical and concave-surface substrates. On the other hand, since the screen printing plate is soft and has a certain elasticity and the printing pressure is small, the screen printing can be printed not only on the hard material but also on the soft material and the fragile object. Not subject to the texture of the substrate. In addition to this, in addition to direct printing, screen printing can also be printed by indirect printing as needed, that is, screen printing on gelatin or silicone plates, and then transferred to the substrate. Therefore, screen printing is highly adaptable and has a wide range of applications.
2 The ink layer is thick and has a strong three-dimensional effect. The thickness of the ink layer on the substrate is different in different printing methods. The thickness of the offset and embossed ink layer is generally about 5 μm, the gravure is about 12 μm, the flexographic printing is about 12 μm, and the thickness of the screen printing ink layer is different. It far exceeds the thickness of the above ink layer, generally up to about 30 μm. Thick film screen printing for special printed circuit boards, the thickness of the ink layer can reach 1000μm, the Braille lettering is printed with foaming ink, and the thickness of the ink layer after foaming reaches 300μm. The screen printing ink layer is thick and has a strong stereoscopic effect, which cannot be compared with other printing methods.
Screen printing can be done not only in monochrome, but also in color and screen color printing.
3 strong light resistance, bright colors. Because screen printing has the characteristics of missing prints, it can use a variety of inks and coatings, not only pastes, binders and various pigments, but also coarser coatings. Other than that. Screen printing inks are easy to dispense, for example. The light-resistant pigment is directly placed in the ink to make the screen printing product have strong light resistance, and is more suitable for advertising and signage outdoors.
4 printing size is large. Generally, printing methods such as convex examples and offset printing have a maximum printing sheet size of a full sheet or a double sheet. Above this size, it is limited by mechanical equipment. Screen printing can be used for large-area printing. Today's screen printing products have a maximum format of 3×4m2 or even larger. Screen printing can also be printed on ultra-small, ultra-high-precision special items. This feature gives screen printing great flexibility and wide applicability.
The limitation of screen printing compared to lithographic offset printing is that the level of reproduction is small. The color printing color stability is difficult to control, the overprinting error is also large, and it is difficult to print fine products.