In water-based or solvent-based printing ink formulations, there are different antifoam or foam-stablizing agent such as emulsions or resins, dispersants, or waxes, etc., During the grinding or mixing process, there are big bubbles and micro bubbles appearing due to air. Foams can cause various problems in the production process. The production efficiency will be reduced, the energy consumption will be increased, and there will be defects in the printing surface. With the adding of silicone defoamers, the bubbles can be eased and the production process can be easier.