In the printing industry, the performance of ink is directly related to the quality of printed materials. However, in the process of preparation and use of ink, foam problem is often encountered, which not only affects the fluidity and uniformity of ink, but also may lead to printing defects and reduce the overall quality. Therefore, the emergence and application of ink defoamers are particularly important.

Ink foam mainly comes from the following aspects: First, the pigment, filler and resin in the ink are easy to form bubbles in the process of mixing and dispersion; Secondly, the gas generated when the solvent in the ink evaporates will also form bubbles; Thirdly, during the transportation and printing process of ink, air is introduced due to mechanical effects such as pumping and stirring.

Ink defoamers mainly play a role in the following two ways: one is to destroy the surface tension of foam, so that bubbles can break quickly; The second is to inhibit the formation of foam and reduce the stability of bubbles by adsorption on the surface of bubbles. Defoamers usually have low surface tension and high dispersibility, and can quickly diffuse into ink to effectively eliminate foam.

Ink defoamers are widely used in various printing inks, such as offset printing ink, gravure ink, flexographic ink, and screen printing ink. In the production process of ink, the addition of defoamer can effectively prevent the production of foam and improve the preparation efficiency of ink. During the printing process, defoamers can maintain the stability and fluidity of ink, ensuring the quality of printed materials.

When choosing ink based defoamers, factors such as ink type, viscosity, solvent type, and printing process need to be considered. At the same time, the amount of defoamer added needs to be adjusted according to specific circumstances, as too much or too little may affect the performance of the ink. In addition, attention should be paid to the compatibility between defoamers and ink to ensure that no new impurities are introduced or affect the drying speed of the ink.