Corrugated board color shades are inconsistent and "run version"

Corrugated board printing is an important process for the manufacture of corrugated boxes. Modern cardboard printing generally adopts ink-and-ink printing. If it is printed well, it can add color to the cardboard box and improve the craft level of the cardboard box, which is favored by users; otherwise, it will greatly worsen the carton. For example, in a batch of cartons, the same color, the color difference is very large, deep, shallow, some very deep, some very shallow, which will make it difficult to accept, will inevitably be subject to user 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 graphic deviation from the customer's request, it is what people call the "run version" phenomenon. This carton will not be accepted by the user. 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 depth and "run version"?

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. Since the ink solvent volatilizes during the printing process, the base viscosity increases, and in order to maintain the stability of the ink viscosity, the ink stabilizer should be added every 0.5-1 hour, and the amount added is 1%-2%.

2. Keep the amount of ink transferred 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. Keep the paper feed stable. 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 properly handled, such as folding along one side (or both sides) of the cardboard transverse pressure line; hand pressure feeding, etc. All guide gaps should be consistent. These are related to keeping the cardboard stable The important link is also an important method to prevent the "run version" phenomenon.

4. To keep the printing equipment in good condition. The emphasis here is to keep the anilox roll and printing plate clean, clean and directly related to the printing effect. The anilox roller is related to the ink transfer performance, and the printing plate is related to the print text and the clarity of the pattern.

Author: Yin Xueying