The color printing carton packaging manufacturer has summarized the following five small methods to effectively solve the color difference problem.

1、 Check whether the printing layout is reasonable

Whether the layout design is reasonable is the premise for us to print high-quality products. According to many years of experience, it is better to put a larger pattern in the mouth of the mouth to control the paper, and it is easier to print non discolored prints.

2、 Check the ink system for problems

After eliminating the chip problem, we should check whether there is a problem with the ink system. There is also a simple way to check the ink path system: first, we use car wash water (water can be added) to thoroughly clean the ink path. After parking, we should check whether there are white crystalline particles in the ink path. If we find such a substance exists, the discoloration may be caused by the local discoloration of the printed matter caused by the crystal material Hemel, which often reflects the partial color deviation of the printed matter.

After washing the car, we didn't find these crystalline substances. We restarted the printing machine and inked to each ink roller. After inking, we closed the ink roller and the water roller to check whether the pressure reached the standard. If not, I suggest readjusting the pressure of all ink rollers to reach a better state.

3、 Trial printing with coated paper

Trial printing with coated paper can avoid the influence of paper on printing. For thin paper, we should try to turn down the air volume on the embossing, and for thick paper, we should turn up the air volume appropriately. If the printed matter has changed color, we should not start to make such a conclusion about the problem of the printing machine itself. We should first look for the reason on the periphery of the printing machine. We should first use a magnifying glass to observe the dot on the printing plate to check whether it has deformed the dot. If we find that there has been deformation of the dot on the printing plate, Then we should check the film and eliminate the problems when the film is released.

4、 Check the condition of the paper under the paper

Check the paper unloading condition, including the adjustment of the paper unloading air, the flatness of the paper on the front gauge, the fit between the paper and the paper press, and the operation of the paper feeding belt. After there is no problem with the ink path system, the water path should be checked, and the pressure between the plate aligning water roll, metering roll, bucket roll, and channeling roll should be adjusted. In particular, the pressure of the intermediate roll should be adjusted, and the intermediate water roll should not be used in the printing process if its own technology is insufficient.

5、 Check the condition of tooth cushion gasket

If the discoloration problem is still not solved after doing all these things, it may be necessary to consider the problem of teeth. In addition, when cleaning the tooth pad, remove the spring for cleaning. Some manufacturers only know how to clean the tooth pad, but they don't know that it is wrong to clean the tooth piece in this way. To check whether there are dead teeth, high-efficient rust remover such as WD-40 should be used, and the teeth and dental shafts should be oiled to ensure that there are no dead teeth.

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