How to Solve Foaming Issues in Water-based Inks? Chemi Tech Offers Efficient and Stable Solutions

In today's printing industry, water-based inks are increasingly used due to their environmental benefits. However, during production, stirring, circulation, and high-speed printing, the system is prone to generate stubborn foam. This foam can lead to defects such as white spots, pinholes, and uneven color on printed materials, severely affecting print quality and production efficiency, and even causing ink waste and increased equipment cleaning burdens.

Common defoamers on the market often face challenges: some have insufficient defoaming power, leaving foam incompletely eliminated; others have poor compatibility, affecting ink gloss and transparency; still others lack persistence, quickly losing effectiveness in the system and failing to cope with long-term circulation operations. How to choose a defoamer that is efficient, stable, and does not affect the final print result has become a core concern for many ink manufacturers and printing companies.

Addressing these pain points, Chemi Tech leverages years of technical expertise to develop a series of high-performance water-based ink defoamers. Our solution is not simply about adding an additive, but provides a systematic approach based on a deep understanding of foam generation mechanisms.

First, precise diagnosis. Our technical team analyzes the customer's specific ink formulation, production process (such as stirring speed, temperature), and printing conditions (such as printing speed, anilox roller type) to identify the key stages where foam is generated.

Second, product selection and evaluation. Chemi Tech offers multiple defoamer products with excellent foam suppression and breaking capabilities, while maintaining good compatibility with water-based systems, avoiding craters or affecting interlayer adhesion. We recommend customers conduct small-scale trials simulating actual production conditions to observe defoaming speed, persistence, and impact on ink properties.

Third, optimizing the addition protocol. Once the suitable product is identified, we guide customers on the optimal addition point and dosage. It is generally recommended to add during the grinding/dispersion stage or the let-down stage, ensuring uniform dispersion for long-lasting defoaming effect. The addition amount is typically low, between 0.1% and 0.5%, making it cost-effective.

We once assisted a packaging printing company in East China to solve foam issues during their high-speed flexographic printing process. The company experienced severe foam accumulation in the ink pan and transfer rollers when using a specific water-based ink at high speeds, resulting in unclear printed patterns. After analysis by Chemi Tech technicians, we recommended the Chemi Tech DF-213 product and guided them to add it at a 0.3% ratio in the later stage of ink preparation. After application, foam was controlled immediately and persistently, allowing the press to run stably at its maximum design speed. Print quality improved significantly, and the customer highly appreciated the stability and cost-effectiveness of the results.

Choosing Chemi Tech means you gain not just a defoamer, but a targeted problem-solving solution and ongoing technical support. We are committed to helping customers improve product quality, reduce overall costs, and achieve smoother, more efficient production operations.