How to keep the color consistency and layout accuracy of corrugated board ink printing

Corrugated board printing is an important process for the manufacture of corrugated boxes. Modern paper printing generally uses ink and ink printing, printing is good, can add color to the carton, improve the level of craft of the carton, favored by the user; if the printing is not good, will make a good end of the carton greatly inferior. For example, in a batch of cartons, the same color, the color is very large, deep, shallow, some very deep, some very shallow, it will make it difficult to accept, will inevitably be the user's censure, will be returned. The accuracy of the printing position is also very important. The arrangement of the text and the accurate and reasonable position of the pattern will improve the degree of work of the carton. If the text deviates from the coordinates that should be in place, it is what people call the "run version." This kind of carton is also not acceptable to users. If the dislocation is serious, the carton will be scrapped, causing economic losses to the company. What is the reason for the inconsistency in printing color shades and "runs"?
The main reason is that the ink viscosity is poorly controlled; the ink transfer state is unstable; the paper feeding state is unstable. The poor flatness of paperboard is also an important reason.
Therefore, to maintain the consistent color and layout accuracy of corrugated board ink printing, the following must be done:
1. Keep the ink viscosity stable. The ink viscosity is the main indicator that needs to be controlled in the printing of corrugated cardboard. It is one of the main factors that affect the printing color condition. As the ink solvent volatilizes during the printing process, its viscosity will increase. To maintain the stability of the ink viscosity, the ink stabilizer should be added every 0.5 to 1 hour, and the amount added is 1% to 2%.
2, keep the amount of ink transmission stable. For this reason, it is necessary to maintain a balanced and stable printing speed. Because the speed of printing is related to the state of ink transfer, it must be run in a balanced manner and cannot be ignored. Balanced paper should also be maintained, and paper feeds cannot be separated. Only in this way can the ink printing machine have a stable ink transfer state, which has an important role in maintaining the stability of the printing ink color.
3, to maintain a stable state of paper feeding. In addition to the stable operation speed of the printing press, the manual feed point should be fixed. For poorly flat cardboard, it should be able to properly handle, such as transversal along the side of the cardboard line (or both sides); hand pressure and so on. The guide roller gap should be the same. These are important ways of keeping the cardboard stable.
4, to keep the printing equipment in good condition. The emphasis here is to keep the anilox roll and printing plate clean and clean. Whether they are clean and clean is directly related to the printing effect. The anilox roller is related to ink transfer performance, and the plate is related to the sharpness of the print.
As a result of consensus on the above points, workers are strictly enforced in their operations. Over the past few months, more than 200,000 high-end cartons have been printed. There has been no "color difference" or "runaway" phenomenon. The product has been well received by users. (Ren Yingyong)