An appropriate amount of defoamer can stabilize the ink system, reduce bubble interference, and help with the normal drying of ink. However, excessive defoamers may reduce the cohesion of the ink system, affecting the solvent evaporation rate in the ink and resulting in slower drying speed. In addition, certain types of defoamers, such as those containing specific surfactants, may interact with other components in the ink, further affecting the drying process.

In the actual printing process, if the ink drying speed is too slow, it may cause problems such as adhesion and dirt on the printed matter, affecting the quality of the printed matter. Therefore, when selecting and using defoamers, it is necessary to fully consider their impact on the ink drying speed to ensure that the ink can dry within a reasonable time.

The glossiness of water-based ink is closely related to factors such as ink dispersion stability, water content, and the type and amount of additives used. Defoamers, as one of the commonly used ink additives, have a significant impact on the glossiness of ink. Defoamers can reduce the surface tension of ink systems, thereby affecting the dispersion and flowability of ink. When the bubbles in the ink are eliminated by defoamers, the dispersibility of the ink is improved, which helps to increase glossiness. However, if the amount of defoamer used is too large, it may damage the dispersion stability of the ink, resulting in a decrease in ink glossiness.

Specifically, defoamer itself has the property of low surface tension. Although it can reduce the amount of wetting dispersant to eliminate foam, it will reduce the viscosity of the system, thus affecting the dispersion effect of water-based ink. Experiments have shown that the glossiness of water-based inks decreases with the increase of the mass fraction of defoamers added.

Taking into account the impact of defoamers on ink drying speed and glossiness, the appropriate type of defoamer should be selected based on the specific formula and printing conditions of the ink. Different types of defoamers have different effects on ink performance, so it is necessary to determine the optimal choice through experiments. When using defoamers, it is necessary to strictly control their dosage. Excessive defoamers may have adverse effects on the drying speed and glossiness of ink. Therefore, it is necessary to adjust the dosage of defoamer according to the actual situation to achieve the best defoaming effect and ink performance. By adjusting the ink formula, such as changing the types and amounts of pigments, binders, and additives, the drying speed and glossiness of the ink can be further improved. This requires experimentation and optimization based on specific printing needs and market requirements.

In summary, water-based ink defoamers have a significant impact on the drying speed and glossiness of ink during the printing process. By reasonably selecting the type of defoamer, controlling the dosage, and optimizing the ink formula, precise control of ink performance can be achieved, improving the quality and market competitiveness of printed products.