Everyone does not know why a dehumidifier is needed in the ink production workshop, because the ink drying speed is too slow, which will seriously affect the print quality. So what role does the dehumidifier play in the process of ink drying?

What causes the ink drying speed to not meet the standard?

There are many reasons why the ink drying speed is too slow. For example, the temperature of the production environment is too low, the nature of the ink itself, and the additives. Moisture of the air is also an important factor. The more humid the air, the slower the ink drying speed.

Reasons for air humidity:

1. The air humidity in the workshop is too high: the production environment is too humid, and the ink releases moisture into the air at a slower rate during the drying process. This is also the main reason why printing plants in southern my country are prone to smearing on the back during the rainy season. The front product is not dry yet, the back product is pressed up, so that there will be patterns and text on the back of the back product.

2. The paper has a large water content: the air humidity is high, and the paper water content will increase. Because the paper is very hydrophilic, it will prevent the penetration of ink and reduce the oxidation drying ability. At this time, the fiber produced is in a relaxed state, and the capillary The holes are filled with water molecules. As a result, the penetrating ability of the ink decreases, and the paper cannot absorb the ink well, so the drying speed of the ink will slow down, resulting in smearing on the back side.

3. Increased ink humidity: In a high-humidity environment, the offset printing ink on paper is in an emulsified state, and it is easy to absorb water vapor in the air, so that the evaporation speed of the ink is also slowed down, so the ink The drying speed is also reduced.

Therefore, in the offset printing production process, once it is found that the ink drying speed is caused by the humid production environment, then it is necessary to find a way to dehumidify. You can turn on the fan, or open the doors and windows to speed up ventilation. Of course, the most suitable method is to use the Nesda dehumidifier, which is a professional equipment to deal with humidity. The freezing dehumidification technology can quickly remove the humidity and reduce the air humidity to ensure that the printing production is not Will be affected by moisture, speed up the ink drying speed, you can eliminate the back smear phenomenon.