Due to the interaction of various components in water-based ink, the factors affecting foam are very complex. So let's explore the factors that  affect water-based ink foam.

1. If the pH value of latex ink is high, It is adverse to the control of foam;

2 Acrylic ink use emulsion polymer as a film forming agent, emulsion particles are very fine, which resulting in the difficult defoaming work. Pigment particles such as carbon black, phthalocyanin blue and phthalocyanin green and other organic pigments in water-based ink have the tendency to increase foam, which is also caused by the fine pigment particles, defoaming is also difficult.

3. Because many defoaming agents will affect the dispersion of pigment, pigment particles will adsorb defoaming agent particles, so when selecting defoaming agent, storage stability test must be carried out.

4 Add wetting dispersant in some water-based ink foam has a significant effect. For example, polypropylene salt wetting dispersants have more foam than other wetting dispersants. In general, wetting dispersants with low dispersion ability also have less foam. The thickener can make defoaming of highly viscous ink especially difficult. This kind of ink has its own special defoaming agent.

5.The drying time of ink film is closely related to the choice of defoamer. In the printing process, the ink film is required to dry quickly, so the defoaming agent with strong defoaming force should be selected in ink and wash. In the process, the ink film is required to dry quickly, Therefore it is need to choose a strong defoaming agent in the ink.

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