Screen printing belongs to stencil printing, which is called four printing methods together with planographic printing, gravure printing and gravure printing. Stencil printing includes copying stencil, engraving stencil, stencil printing and screen printing. The principle of stencil printing is: when printing, the ink is transferred to the substrate (PC film, stainless steel, acrylic, etc.) through the holes of stencil under certain pressure to form images or characters. Transcription printing is the simplest stencil printing, which began in the late 19th century. This kind of printing is made of special wax paper by typewriter or iron pen, and printed on the wax paper by ink roller, and the ideal printing effect can be obtained on the substrate. Screen printing is the most widely used in stencil printing.
screen printing is to stretch silk fabric, synthetic fiber fabric or metal screen on a screen frame and make a screen printing plate by photochemical plate making. Modern screen printing technology is to use photosensitive materials to make screen printing plates by photographic plate-making (making the screen holes in the graphic part of the screen printing plate be through holes, but not the screen holes in the graphic part are blocked). When printing, the ink is transferred to the substrate through the mesh of the graphic part through the extrusion of the scraper, forming the same graphic as the original.
Screen printing equipment is simple, easy to operate, and printing and plate making are simple and adaptable. Screen printing has a wide range of applications. Common printed materials include trademarks, panels, nameplates, signs, colored oil paintings, posters, business cards, and printed textiles.
screen printing consists of five elements, namely screen printing plate, scraper, ink, printing table and substrate.
the basic principle of screen printing is: printing is carried out by using the basic principle that the mesh of the graphic part of the screen printing plate is permeable to ink and the mesh of the non-graphic part is impermeable to ink. When printing, ink is poured into one end of the screen printing plate, and a certain pressure is exerted on the ink part of the screen printing plate with a scraping scraper, while moving towards the other end of the screen printing plate. Ink is squeezed from the mesh of the graphic part to the substrate by the scraper during the movement. Because of the viscosity of ink, the imprint is fixed in a certain range. During the printing process, the scraper is always in line contact with the screen printing plate and the substrate, and the contact line moves with the movement of the scraper. Because there is a certain gap between the screen printing plate and the substrate, the screen printing plate produces a reaction force to the scraper through its own tension, which is called resilience. Due to the resilience, the screen printing plate and the substrate are only in movable line contact, while other parts of the screen printing plate are out of contact with the substrate. Make the ink and screen break, ensure the printing size accuracy and avoid rubbing the substrate. When the scraper is lifted after scraping the whole layout, the screen printing plate is also lifted, and the ink is gently scraped back to the original position. This is a printing stroke.
① The three printing methods with strong printing adaptability, namely, planographic printing, relief printing and gravure printing, can only be printed on a flat substrate. Screen printing can be printed not only on plane, but also on substrates with curved surface, spherical surface and concave-convex surface. On the other hand, screen printing can be printed not only on hard objects, but also on soft objects, which is not limited by the texture of the substrate. In addition, besides direct printing, screen printing can also be printed by indirect printing method as needed, that is, screen printing is first carried out on gelatin or silica gel plate, and then transferred to the substrate. Therefore, it can be said that screen printing has strong adaptability and a wide range of applications.
② The ink layer is thick, with strong stereoscopic impression and rich texture. Generally, the ink layer thickness of offset printing and relief printing is about 5 microns, gravure printing is about 12 microns, flexographic printing is about 1 microns, and the ink layer thickness of screen printing far exceeds the above-mentioned ink layer thickness, generally reaching about 3 microns. Thick screen printing for special printed circuit boards, the thickness of ink layer can reach 1 microns. Braille dots are printed with foamed ink, and the thickness of the foamed ink layer can reach 3 microns. Screen printing has thick ink layer, rich texture and strong stereoscopic impression, which is incomparable with other printing methods. Screen printing can be not only monochrome printing, but also color printing and screen printing.
③ Strong light resistance and bright color. Because screen printing has the characteristic of missing printing, it can use all kinds of inks and paints, not only slurry, adhesive and pigments, but also coarse-grained pigments. In addition, the preparation method of screen printing ink is simple, for example, the light-resistant pigment can be directly put into the ink for preparation, which is another major feature of screen printing. Screen printing products have great advantages of strong light resistance. The practice shows that the maximum density range of offset printing is 1.4, embossed printing is 1.6, gravure printing is 1.8, and the maximum density range of screen printing can reach 2., so the light resistance of screen printing products is stronger than that of other kinds of printing products, and it is more suitable for outdoor advertising and signage.
At present, the maximum area size printed by general offset printing, relief printing and other printing methods is full page size, and beyond the full page size, it is limited by mechanical equipment. Screen printing can be used for large-scale printing, and the maximum range of screen printing products today can reach 3 meters ×4 meters, or even more.
there are usually two kinds of screen printing, namely manual printing and mechanical printing.
manual printing refers to the manual operation from paper continuation to paper delivery, the up-and-down movement of the printing plate, and scraping and scraping.
mechanical printing means that the printing process is completed by mechanical actions. Among them, it is divided into semi-automatic and full-automatic printing. Semi-automatic means that the substrate is put in and taken out by manual operation, and printing is done by machinery. Fully automatic means that the whole printing process is completed by machinery.
screen printing is not only suitable for ordinary paper printing, but also has a wide range of adaptability. For example: pc film, PVC film, pet plastic substrate, acrylic, ceramics, glass, printed circuit board, etc. According to the different texture of the substrate, the printing is not the same. Although there is an inseparable internal relationship between the various series, each series has its own particularity because of the different texture of the substrate (that is, different chemical and physical properties). Therefore, people usually divide it into paper printing, plastic printing, ceramic printing, glass printing, circuit board printing, metal printing, textile printing and so on according to different substrates. In this way, their respective relatively independent printing systems are formed.
what is the main process of screen printing? The main processes of screen printing are: making original manuscript, making screen printing plate, printing, ink drying and so on.
Foshan Shunde color cube sign co., ltd. was established in 213, specializing in the production and sales of plastic signs and hardware signs for supporting products. Products are widely used in household appliances, industrial appliances, furniture decoration, lighting accessories and many other fields.
the company has many years of professional experience in developing and manufacturing various signs; Have a strong sign manufacturing team; Has a modern workshop of 2 square meters; It has a large-scale dust-free workshop, which is equipped with the most advanced automatic numerical control production equipment in the industry at present-accurate and fully automatic silk-screen printing production line, semi-automatic silk-screen printing machine, high-precision CNC engraving machine, laser machine, fully automatic cutting machine, punching machine and a number of modern advanced equipment and reliability testing instruments are readily available. The monthly production capacity is more than 3 million pieces.
we warmly welcome customers from all over the world to inquire and guide and cooperate in development. Looking forward to the future, our company will continue to explore and innovate, be proactive and develop steadily, and create brilliant achievements hand in hand with customers from all over the world.
color cube sign official website: www.clfmb.com
photo of color cube factory building
screen printing control panel produced by color cube sign
screen printing control panel produced by color cube sign
screen printing control panel produced by color cube sign
screen printing control panel produced by color cube sign.