Do you know the color difference control method of PVC blister film?

PVC blister film is widely used in daily cabinets and other places, but a problem is found in people's use, that is, there is color difference, which is a common problem in the production process. In the PVC film printing process, how to ensure the relative consistency of hue, today we will discuss this issue in detail. Personnel Mainly the skills of color matching operators and printing operators, strengthen the theoretical study and training of relevant personnel, and improve the skills of personnel with a lot of practice; Equipment Printing machine overprinting accuracy, squeegee and printing plate stability. Through the effective management of the equipment, the accuracy of the equipment can be maintained and the service life of the equipment can be improved; the color difference of the original film, the ink absorption of the original film, the smoothness of the original film, the color shift of the ink, and the stability of the ink in the printing process Wait. By strengthening the control of suppliers and the inspection of incoming raw materials, we will ensure that the color difference of the base paper and the color shift of the ink are minimized, and various physical and chemical performance indicators are as stable as possible; Normativeness of the method. Formulate and effectively implement relevant process technical specifications and adaptive management methods to maintain the stability of color management before printing and the printing process, temperature, pressing force, blade position and pressure, printing speed, and standard film samples; The color consistency requires no deviation in the hue of the ink. First of all, it is best to use the same batch of ink. Because of different batches of ink, although some hues have little change, some have changes, which requires a good control over the supply of raw materials. The consistency of the ink hue is the most basic requirement and an important condition. If the ink hue deviation is too large, it is difficult to control the hue consistency by other methods. When several colors are stacked together or the ink layer is thick, the hue The difference is obvious. Secondly, it is required to add less ink to the ink tray each time to keep adding new ink frequently, especially for some patterns with less ink. If too much ink is added at one time, the ink will be used for a long time without new ink being added. Its hue will change. For example, black ink that has been used for a long time is gray, not as pure as new ink, and red ink that has been used for a long time will become dark red, not as bright red as new ink. The viscosity of the ink is required to be consistent from beginning to end, and it is best to use a viscosity controller to control it. Consistent color achieved by the scraper The position where the scraper contacts the printing plate has a great influence on the color, especially the hue of the light texture, so it is required that the scraper is basically in the same position from beginning to end. When the pressure of the squeegee changes too much, it will affect the light screen printing color. Achieving color consistency through the printing plate The influence of the printing plate on the hue is mainly manifested in: 1. Blocking: At this time, the transfer amount of the ink is reduced, thereby affecting the hue. Therefore, it is necessary to clean the printing plate with de-powder so that it can be printed in a normal state. 2. Wear of the printing plate: When the number of printing plates is large, as the degree of wear increases, its hue will change, and generally it will become lighter. In order to solve this problem, if the printing batch is large and the varieties are printed in the field, you can dilute the ink in the new version, and then gradually reduce the degree of diluting as the printing volume increases, until it is no longer diluted. The control of hue is composed of many factors. As long as every detail is strictly required, there is no problem.

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