Offset printing is a common printing method that transfers ink from the printing plate to the rubber cloth and then to the printing material. Foam is easily generated during the stirring, pumping and high-speed operation of the ink during printing. This article will take you to explore the application of offset ink defoamers in depth.
The presence of foam will interfere with the accurate transfer of ink between the printing plate and the printing material, causing the shape and size of the dots to change. This will affect the clarity and color reproduction of the image, greatly reducing the quality of the printed product.
Uneven ink coverage The foam occupies the space of the ink, making the ink unevenly covered on the printing material, resulting in mottled and white spots, which seriously affects the beauty of the printed product.
Offset ink defoamers can quickly eliminate foam in the ink system. Moreover, it can control the re-generation of foam for a long time. This ensures the stability of the ink throughout the printing process, allowing the printing operation to continue and stabilize. In addition, it is well compatible with the offset ink system and will not have a negative impact on its performance.
When applying defoamers for offset printing inks, the amount of defoamers added needs to be strictly controlled. Too little addition may not achieve the desired defoaming effect, while too much addition may affect the performance of the ink, such as reducing the viscosity of the ink. Generally, it is necessary to conduct tests based on the specific conditions of the ink and the printing requirements.
Defoamers for offset printing inks are indispensable in offset printing. By solving the foam problem in the ink, it significantly improves the printing quality and ensures the effective and stable operation of the printing process, while also meeting the environmental protection requirements of the modern printing industry.
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