Types of screen printing

Screen printing first originated in China, more than two thousand years ago. As early as in the Qin and Han dynasties of ancient China, the valerian printing method appeared. By the Eastern Han Dynasty, valerian batik dyeing had become popular and the quality of printed products had also improved. During the Daye period of the Sui Dynasty, people began to print with frames stretched with silk nets, making the valerian printing technology developed into screen printing. According to historical records, exquisite costumes worn in the court during the Tang Dynasty were printed in this way. In the Song Dynasty screen printing and had a development, and improved the original use of oily paint, began to add starch in the dye powder, so that it becomes slurry screen printing, screen printing products more brilliant color. The colorful printing on cosmetic bottles is the result.

Screen printing is a great Chinese invention. The American magazine Screen Printing commented on Chinese screen printing technology as follows: "There is evidence that the Chinese used horsehair and stenciling two thousand years ago. The clothing of the early Ming Dynasty attests to their competitive spirit and processing skills." The invention of screen printing promoted the development of human material civilization in the world. Today, two thousand years later, screen printing technology has developed and perfected, and has become an indispensable part of human life.

There are usually two kinds of screen printing, that is, manual printing and mechanical printing. The former is light and flexible, suitable for small batch order and special substrate, such as small batch bamboo cosmetic bottle, lipgloss tubes, eyeshadow palette; The latter is fast, stable and suitable for large volume orders, such as cosmetic bottles and jars, airless bottles and so on.

Manual printing refers to the up and down movement of the printing plate from the replenishing paper to the receiving paper, and the scraping and scraping are manual operations.

Mechanical printing means that the printing process is completed by mechanical action. Which is divided into semi-automatic and automatic printing, semi-automatic refers to the substrate into and out of manual operation, printing by mechanical completion; Fully automatic means that the whole printing process is completed by machinery.

There is also a fast and simple curved screen printing method of live screen printing, that is, the screen layout is removed directly close to the substrate surface for printing. Using live screen printing method, can print a large number of processing printing products, such as bowls, plates, cosmetic container bottle. At the same time using this method can be printed on the car sign character, also can be printed on the irregular plane.

The production of live screen version: the first photosensitive text version of dry repair processing, and then pick, according to the size of the cut. And at both ends of the screen plate with wood or aluminum sheet as the skeleton with adhesive tape tightly, can also be used directly adhesive, so that you can make the required live screen plate. The operation method of live face network: according to the substrate selection of different printing materials for deployment: First of all, the plate and plate are selected and the ink is blended. Then, one person holds the living screen plate in both hands and sticks the printed part tightly to the substrate surface. The other person uses a scraper to evenly dip the ink into the upper surface of the scraper on the ink mixing plate.

If the printed graphic area is too large, the ink can be poured on the page according to the situation, but do not let the ink flow out of the substrate. Pay attention to the deployment of ink is not too thin, also do not be too dry, dry and wet moderate. Small area printing, printing, painting, can be operated by one person, the method is to stick one end of the face plate with packaging tape on the required position of the substrate machine, and then, with the other hand to pull the printing plate close to the substrate, you can print. Starting note: be sure to stick the tape one end of the direction of the lighter plate, if two people operate the starting plate advertising is the same, using this method of printing, with convenient operation, flexible requirements for the substrate, can be small, the number can be more or less, with the advantages of low cost and energy saving.