Non-toxic gravure plate (2)

ImageOn preparation before laminating to the plate Before laminating the ImageOn film onto the plate, the ImageOn film is trimmed and the cut size is slightly larger than the size of the plate. Be especially careful when dealing with ImageOn films, because improper handling can cause the ImageOn film to become uneven, leading to unnecessary results in the final printing. In this way, ImageOn emulsions can be firmly adhered to the plate so that the plastic film support layer of the film can be easily removed. As long as the ImageOn film is cut from the roller, it is curled in itself. The support layer to be peeled off lies on this naturally curled inner surface. To remove the inner plastic support layer, place the ImageOn film between the thumb and forefinger and gently separate the thumb from the index finger so that the texture of the thumbprint captures the edge of the support layer and causes the support layer to curl back. This technique takes time and skill to master. One way to achieve the best of both worlds is to wrap around the corner of the ImageOn film, just like the corner of the book you rolled up when you read the book, and rub against this folded part until the support layer is separated from the ImageOn emulsion layer. Be sure to remove the inner peeling support layer instead of the outer polyester film layer. The inner plastic peeling support layer has a soft feel like a gladiolus bag, while the outer polyester film layer has a crispy feel, just like cellophane. Then, ImageOn is placed on the fairly smooth surface of the press platform. This smooth laminate surface is polished from stainless steel or Laxon. If the lamination surface has slight scratches or defects, the ImageOn film will not be printed and will be noticed in the final printing. Then, the ImageOn emulsion was evenly sprayed onto the printing plate by means of a plant sprayer containing rubbing alcohol and water. ImageOn Laminate Although laminating technology recommends the use of an aqueous alcohol solution made from a mixture of three parts of rubbing alcohol and three parts of water, it is still possible to paste ImagOn film only with water. If water is used as a laminating agent, it is recommended that the plate be dried for several hours before use. Some pre-etched or re-used layouts require a stronger aqueous alcohol solution so that ImagOn can paste more efficiently. The higher the content of alcohol in the spray, the harder it is to work because ImagOn pastes it onto the plate particularly quickly. Laminated ImagOn onto the plate A copper plate polished with 320 mesh wet-dry sandpaper will be raised 2 inches in parallel with the moist ImagOn film and the plate will slowly fall to the surface of the film. The edge of the ImagOn film is cut with a very sharp knife. Note: The cutting knife should not come into contact with the etching table. Make sure you don't knife in this way, as this can distort the laminate surface on the etch press platform. When the excess ImagOn film is cut off, the etched blanket drops to cover the entire printing plate, and then prints in the same way. In this way, the printing press consists of a plate of ink on foot. However, it is very important to ensure that this action must be completed slowly. During the lamination process, the speed of the press platen across the embossing roller should be 1 foot every 12 seconds. Etching to the grey fabric is usually used and the pressure of the press is slightly higher than the pressure required to print a good product. Once the ImagOn film passes the press, the edge of the ImagOn film is trimmed to ensure that the ImagOn emulsion is flush with the edge of the plate. The edge of the knife must be sharpened and must be cut in such a way. - The cutting action does not cause the edge of the ImagOn film to lift from the plate. This kind of cutting action is very important. Now the plate is ready for exposure. Exposure of various types of UV light sources to ImagOn can be used for ImagOn film exposure. Although sunlight can expose ImagOn, it is almost impossible to achieve a constant result. According to the season and the time of day, the exposure time of sunlight can range from a few seconds to several minutes. Although the exposure time of other types of commercial exposure devices varies from a few seconds to several minutes, it can produce good and constant results. In order to optimize the image effect, the most important thing is to strictly control the exposure. In addition, a good vacuum design for the exposure unit is crucial for good contact between the positive dot film or line drawing and the ImagOn emulsion. For a highly efficient point source exposure device with optical integration, there is no real alternative. Because many commercial printers no longer use the older technology of spot light exposure devices, they use relatively easy to provide exposure equipment. It is advisable to call all printing owners around you by calling the Yellow Pages to inquire whether they have plate torches to sell. Avoid using screen-printing exposure devices that use fluorescent light sources because these light sources do not produce good results for ImagOn. Exposure time The vacuum platform uses a 400W mercury vapor lamp, which is 14" away from the vacuum platform. Exposure times vary from 15 seconds to 1.5 minutes depending on the stencil to be exposed. Exposure of a household, 1000W, metal halide light source exposure device The time can be from 3 seconds to 20 seconds. These light sources can produce good results and can be found in any industrial electrical or lighting store. To ensure the cleanliness of mercury vapor and metal halide lamps. If you are assembling your own exposure device to ensure Qualified electrical engineers are required to perform the suspension installation and meet the local safety certification standards, and it is important that the guarantor's eye is not exposed to the light output from a high-density UV light source. Designed in such a way that no direct exposure of the eyes to UV light sources, whatever the exposure system used, the most basic is to perform step-by-step tests to determine the correct exposure times for various applications and programs related to gravure printing techniques. Once the optimum exposure times for various gravure plate technologies are obtained, for each technology Various elements will yield optimal output. Understanding this concept is important. For any exposure device, determining the ideal exposure time is a series of test exposures to determine the best result. The best exposure time is to do test patterns and print in gravure printing. By doing these test editions, you are not only developing these plates and drawing conclusions from them, but you can also print to Australia There is an in-depth potential understanding of the technology. Once these “optimal” exposure times have been determined, it is recommended that they be referenced on the side of the exposure device and later referenced. Remove the top polyester film from the ImagOn coating plate on the exposed Before the ImagOn plate is developed, the top polyester film layer is peeled off.Some techniques, like Howard-Type, need to peel the polyester film before exposure. The technology is the same.The handle opens and flicks the edge of the ImagOn coating plate to peel the polyester film.When the edge of the polyester film is raised, it is peeled from the plate. Use only a variety of anhydrous soda ash (sodium carbonate) 10 grams of soda ash (approximate a flat teaspoon) and add approximately 4 tablespoons of hot water until the powder dissolves Add water at room temperature to this dissolved Souda ash In the solution, make the total amount of solution reach 1 liter.The working temperature of the developer should be in the range of 65-70uF Then add the solution to the developer tank.ImagOn development is recommended to wear rubber gloves during the development process, because of the repeated use of the developer It can irritate the skin and cause inflammation of the skin of the hand.Because the developer is an alkaline solution, the most important thing is not to splash the developer into your eyes. For this reason, it is recommended to protect the eyes. If the emulsion layer is on top The polyester film has not been peeled yet, and it must be peeled from the surface of the ImagOn coating plate before developing. Place the plate in the developer and wipe it with a sponge for about 2 minutes. Know exactly when the image development is complete An empirical problem based on the visual observation and tactile sensation of the image during the development phase. The unexposed areas of ImagOn are revealed by the developer. After the unexposed ImagOn was revealed, the ImagOn emulsion left an uneven surface. After the plate was fully developed, it was washed with room temperature water, and then the water remaining on the plate was removed with a rubber roller. Then the plate is sent to dry, dry method: forced drying with a hair dryer, or air dry.