Screen printing belongs to stencil printing, which is called four printing methods together with offset printing, embossing and gravure printing. The stencil printing includes transcript printing, perforated pattern printing, spray printing and screen printing. The principle of stencil printing is: the printing plate (the perforation of ink through the base of the paper film or other plates) is printed, and the ink is transferred to the substrate (paper, ceramics, etc.) through the perforation of the stencil through a certain pressure ) To form an image or text. Transcription printing is the simplest stencil printing, which began in the late 19th century. This kind of printing is made on a special wax paper, which is made into a wax paper graphic version by a typewriter or a stylus. The ink roller is used to print on the wax paper plate, and the ideal printing effect can be obtained on the substrate. In stencil printing, the most widely used is screen printing.
Silk screen printing is to stretch silk fabric, synthetic fiber fabric or metal wire mesh on the screen frame, and use manual engraving lacquer film or photochemical plate making method to make screen printing plate. Modern screen printing technology is to use photosensitive materials to make screen printing plates through photo-engraving (making the screen holes on the screen portion of the screen printing plate to be through holes, while the screen holes in the non-graphic portion are blocked live). When printing, the ink is transferred to the substrate through the mesh of the graphic part through the squeeze of the scraper, forming the same graphic as the original. Screen printing equipment is simple, easy to operate, printing and plate making are simple, low cost and strong adaptability. Screen printing has a wide range of applications. Common printed products are: color oil paintings, posters, business cards, binding covers, commodity signs, and printing and dyeing textiles.
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