Video-imaging devices can help printers find precise deviations of current flexographic printing. For narrow web flexographic printing presses, the precise imprinting device has not been implemented until today. The quality standards for flexographic printing have steadily increased over the years, and for printers it is smaller traps and stricter registration requirements. In order to adapt to these new standards, plates need to be accurately mounted, typically within a few thousandths of an inch. It is completely impossible to complete this work by naked eyes. With a video camera to enlarge the registration mark, the video platen registration register is more accurate than before and can greatly improve the print quality. A demanding place in quality printing is the registration between printing units. If color printing does not register, the image is blurred, the edges become rough and the printing becomes incoherent, resulting in a white border shadow. To avoid printing defects, experienced proofing workers use a technique known as trapping, which allows the ink to superimpose. Printers can reduce the risk of overprinting by adjusting the number of traps. Avoid trapping in flexographic printing. The traditional trapping technique is about 0.012 inches. However, a large trap size can easily affect the print quality because a clear trapping line can be seen on the finished product. Other types of printing can be accurately registered and the trapping of printed matter is minimal. In order to be able to compete with other printing methods, narrow web press manufacturers have designed a printing press that can greatly improve the registration effect with a deviation of +/- 0.003 inches. Today's design of the flexo printing press traps less and less, which means that the presses have fewer and fewer defects. When registering by hand, the register line on the plate must be aligned with the line imprinted on the plate cylinder. It is not uncommon for the plate to be slipped onto a 0.010-inch plate. This means that if an image is registered on one end of the press, then the image on the other side of the plate will deviate by 0.010 inches from the register line. When another plate on the press is biased in the opposite direction, the problem becomes complicated. The register deviation between these two colors is 0.020 inches. For some products, such inaccuracies are not allowed and must be stopped and reprinted. The loss of production due to the shutdown of the printing press can seriously affect the benefits of the printing plant and disrupt the production plan. The video stencil apparatus proposes a solution to the problem of curved printing plates. Two video cameras arranged in a row enlarge the registration line on the plate and display it on the video monitor. The enlarged image makes more accurate registration possible. The camera and the plate cylinder are attached to the work table in a straight line with the clips, so that the plate and the roller can be aligned. This design can minimize human error. All of this makes the version faster and less than 0.003 inch deviation. Accurate Mounting of Plates The following paragraphs detail three steps for precise plate mounting. 1. First, place the plate cylinder on the plate mount and attach the adhesive strip to the platen. The roller rests in the clip aligned with the camera and is in the center of the camera. The electric driver can lift the drum up and down so that it can be parallel to the table supporting the plate. 2. Second, adjust the register line to align it with the line on the monitor. The video camera magnifies the register line up to 20 times its actual size, and a separate screen can align the register lines so that the register lines can be more precisely aligned. When aligned, the vacuum on the platen supports the plate. The amount of vacuum pressure can be controlled by a foot pedal so that all points are supported on the plate. When aligned, the air pump is turned on and it can safely hold the plate and leave the plate undistorted. 3. Finally, register the plate. Remove the backing paper on the back and ensure the plate on the roller is safe. Next, turn off the air pump to roll the plate on the roller. Once the plate is mounted on the roller it is easy to check its accuracy. Roll the roller under the camera to check every register line on the roller. Check again to contain some errors before printing. In order to register the plate, it is recommended to insert three sets of register lines along the edge of the plate. One set at each end and one set in the middle. Registration can be better checked later. However, on the printing press, the operator prefers to use a set of register lines so that they know that they are always seeing this register line when calibrating. If only one set of register lines is used, it is recommended to place it in the middle of the image so that if deviations occur they will be distributed to both ends of the plate. The next check is a verification system, which is a test for the press, but this content is too far away from this article and it is far from the exact range of some narrow web presses. At the beginning of this article, it was pointed out that video schooling is a technique for narrow web presses. That's because the narrow web printing industry has always used the traditional manual printing technology. The wide web printing press is more suitable and already has a set version and calibration system. In terms of improving the accuracy while reducing the workload of the upper edition, the video edition device is a development trend. This trend is consistent with those factories that do not want to hire full-time graduate school workers. The calibration must indicate that the accuracy of the video plate device depends on the correct calibration of the device. If the components of the device are not precisely aligned with each other, the resulting error will be transmitted to the plate being installed. Each plate will be biased in the same direction and will always be inaccurate. In modern flexo printing, curved plates are not easily accepted. When the print quality is very demanding and the duration is very short, you need to start printing on a press. For the accuracy of today's rigorous job requirements, the video-up device is a fast and stable way of uploading.