When the flexible plate is placed on the front side of the plate making machine, in order to ensure the quality of the film and the flexographic printing surface, the plate making machine is equipped with a vacuum pump to vacuum, and the side of the film required to be close to the flexo must be rough (matte). This can prevent air bubbles from remaining between the film and the flexo plate and affect the quality of the flexographic printing surface. The bead used for the pressure film and the flexographic edge should also be indented and can be used for lateral air conduction. In addition, there are specific requirements for the blackness and transparency of the film. This article will introduce you to the introduction of tungsten steel squeegee.
Such periodic fluctuations not only have a certain influence on the plate roller base, but also the effect on the doctor blade is very obvious. The long time vibration will make the doctor blade scrape dirty, resulting in dirty version. A phenomenon occurs. By increasing the pressure on the doctor blade pressure, the problem can be solved in a short period of time, but the problem cannot be solved fundamentally, and it also has a significant impact on the service life of the doctor blade.
The polishing quality of the surface of the plate roller is mainly manifested by the number of burrs around the cell. The good quality plate has a clean, no burr, and the cells are clear and there are no impurities inside. This ensures that the plate roller does not damage the doctor blade during the printing process. After the squeegee is frequently replaced, if there is still a ruled line on the printed product, it can be generally determined that there is a problem of polishing quality of the plate roll.
In view of the current situation that many brands of imported water-based inks and water-based inks produced by domestic manufacturers try to occupy the market, we suggest that users first familiarize themselves with the various properties of an authoritative brand of water-based inks and the use of corresponding additives. After trying other brands, you should avoid mixing the two brands of water-based inks or additives, because different brands of inks or additives have different formulations. We have encountered the phenomenon of precipitation reaction after adding a domestic slow-drying agent to the imported water-based ink. Under the premise of constant pH and viscosity, the addition of the defatting agent can reduce the color concentration of an ink. The amount should be determined on a case-by-case basis.
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