The process of forming a pattern on the fabric by dye or paint on the fabric is called fabric screen printing. With the rapid development of screen printing technology, special printing technologies such as foam printing, fluorescent printing, luminous printing, pearlescent printing, conversion effect printing, anodized aluminum transfer printing, electrostatic flocking transfer printing, etc. have also been developed accordingly, which makes the application of fabrics The scope is wider. All kinds of colorful fabrics are more practical, and also have a certain artistic appreciation. However, in order to obtain an ideal fabric silk screen product that meets the design requirements, in addition to the reasonable selection and deployment of printing materials, pay attention to the positioning and registration of the fabric when printing. Because of its soft texture, the positioning and overprinting accuracy of silk printing also have a great influence. Here is an introduction to the positioning and registration of fabric silk screen (suitable for manual silk screen). 1. Screen printing positioning method There are two screen printing methods: one is the fixed screen, and the printed matter moves. The other is the mobile version of the screen (run version), the substrate is fixed. There are many ways to position it; 1. Backing method For substrates with a certain thickness and neat edges, the two vertical and horizontal sides can be positioned against the fixed backing on the operating table. 2. Socket method For printed substrates with holes, 2-3 holes can be regarded as positioning holes, which are placed on the nails fixed on the operating table (the height of the nails is lower than the thickness of the substrate) for positioning. 3. Illumination The operating surface is made of glass and other light-transmissive materials, and the lights are installed below. For substrates with certain light transmittance, rely on the light to make the baseline on the substrate coincide with the baseline on the operating table for positioning and overprinting. 4. Inspiratory method For small or thin substrates, the suction holes on the operating table are sucked and positioned. 5. Bonding method The operating table is coated with adhesive, which can stick to the substrate and be positioned in this way. 6. Platen method Screen printing is carried out through screen movement (running version), the substrate is fixed on the long operation board in advance, and the ruled holes on the screen match (can be inserted) Second, the positioning of fabric silk screen 1. For small-area fabrics with a certain thickness and hardness, such as clothing trademarks, hat edges, shoe uppers, and bags, etc., the backing positioning method can be used. If the printing material is too soft, the printing material can be sizing without affecting the screen printing effect and the use effect of the silk printing product to make it “scratching†to facilitate positioning. 2. For large-area fabric printing such as clothing sheets, bed sheets, towels, pillowcase quilt covers, curtains, tablecloths, etc., the printed matter is relatively soft, and it is appropriate to use the platen method to position (run version) screen printing. Third, the platen method positioning 1. Platen structure The platen is erected on wooden, iron or cement brick platform legs, and the height is about 0.7 meters. The countertop is covered with artificial leather, flat and tight, without seams. A cotton velvet blanket is placed under the artificial leather to make it elastic. Ruled holes are reserved on the side of the table top. The advanced operation table is equipped with sinks on both sides, and the end of the plate is provided with a drainage pipe, so that the plate can be washed with water at the end of the silk screen. The length of the platen depends on the area, quantity, speed of printing material drying, number of overprints, production conditions, etc. The long platen is over 100 meters. The platen length is good for overprinting and mass production. If it is limited by the length of the plant, it can be solved by setting a few short plates. 2. Net frame structure The screen frames of fabrics are mostly made of wood or iron. Since the aluminum alloy profile pipe frame has the advantages of light weight, firmness, and not easy to rust, it has been widely used. The fabric silk screen frame is the same as other silk screen frames. There are two threaded holes (the hole distance is 5 cm) on the upper end of the side of the frame about 2 cm away from the horizontal border. As appropriate). The lower end of the same side of the frame also has two threaded holes. It can be used as the rule of the screen frame by screwing on four screws. It can be unscrewed when making the screen, and then screwed on during silk screen printing, which is very convenient. 3. The fixing of the fabric on the table One method is to stick the four sides of a single piece of fabric (not too large in area) to the table with adhesive tape. Another commonly used method is to brush a layer of water-soluble (starch) slurry on the table, spread the fabric on the operating table, and make it stick firmly. Fourth, the accuracy of overprinting The fabric is flattened and glued to the platen. After the first color is silk-screened, the material is not stuck (slightly), then the second color and the third color can be overlaid until the overprint (including overprinting) requirements are completed and the bearing is removed After-treatment of objects (drying, fixing, pressing, etc.). Replace with new substrates. The registration accuracy is improved by the tension of the entire register screen, the rules of the screen frame, and the consistency of the registration of the screen pattern at the same position. 1. Rules of the frame The four rules on the side of the screen frame are positioning devices during screen printing, so they are still positioned by rules during overprinting. The rules of the entire overprinting frame should be uniform and the error should be small. The rules and the rule holes on the table should not be too loose or too tight. If they are too loose, it will affect the accuracy of overprinting. 2. Production of screen version The fabric overprint should be based on the design manuscript. When making the screen version, the color separation film should be overlapped to check whether its registration accuracy meets the design requirements. After meeting the requirements, determine the horizontal and vertical reference lines on each film. Identify the reference line on the film when making the screen, so that each film coincides with the reference line of each screen, so that the pattern can be made on a uniform part of each screen frame, so that it can be registered during silk printing. This is also a fabric The key to silkscreen registration. The manuscripts of silk screen printing patterns are mostly painted on tracing paper and used directly as negatives, so the registration reference line can be determined when drawing. 3. Overprint sequence Fabric screen printing has both practicality and artistry. The overprinting sequence is of great significance for the good performance of screen printing and meeting the design requirements. According to the color of the silk screen, the brightness of the color, the size of the pattern, and the difficulty of overprinting, a reasonable printing order is selected for ordinary printing special printing (appearing on the same silkscreen), overprinting and overprinting. The printing sequence is based on the final screen printing quality. Generally, when ordinary printing (silk printing of dyes or paints) and special printing (foaming, luminous, pearlescent, etc.) are designed on the same silk printing, ordinary printing should be printed before special printing. If overprinting multiple colors, especially when overprinting requirements are made, dark colors should be printed first and then light colors. If overprint and overprint exist at the same time (refer to different colors), you can overprint after overprinting. If the size of each pattern is very different, you can print a small one and then a large one. The printing sequence cannot be considered from one aspect alone, but should be considered from all aspects in order to obtain the ideal fabric silk screen. We will continue to adhere to the tenet of "high-quality products, high-quality life", and welcome friends from all over the world to negotiate business with customers or visit in person for guidance. We sincerely look forward to establishing friendly and cooperative business partnership with customers at home and abroad on the basis of equality and mutual benefit!We are manufacturer of 12 Sets Baby Care Products in China, if you want to buy Twelve-Piece Baby Nail Art Set,New Baby Health And Beauty Kit,Baby Skin Care Natural Product please contact us. 12 Sets Baby Care Products,Twelve-Piece Baby Nail Art Set,New Baby Health And Beauty Kit,Baby Skin Care Natural Product Dongguan Junkai Packaging Products Co., Ltd , https://www.diystoragecases.com
In order to improve the utilization rate of the platen, especially for overprinting, indirect steam pipes or electric heating pipes are often installed under the table to keep the temperature of the table at about 45 ° C. This is often called hot platen screen printing. It is usually sufficient to use a non-heated cold platen. Special printing screen printing on the hot plate should pay attention to the final screen printing effect.