Ink Dispersant Selection Guide: Achieving Low Sedimentation, High Color Strength & Faster Grinding

In fields such as digital printing, ceramic inkjet, and industrial marking, ink performance directly determines print quality, equipment efficiency, and overall production costs.

Are you also frequently troubled by these problems? Ink sediments quickly after storage, causing nozzle clogs and print breaks. Colors aren't vibrant or rich enough, affecting the final product's appeal. The grinding process takes too long, driving up production costs...

Behind these pain points often lies the same core link: dispersion.

Today, let's discuss how to tackle these challenges comprehensively through professional additive solutions.

Poorly dispersed pigment particles tend to agglomerate and settle during storage, forming hard sediment. When loaded into printing equipment, these micron or even nano-scale "clumps" easily clog the fine nozzles, leading to print defects, frequent cleaning cycles, and even nozzle damage — resulting in high maintenance costs and costly downtime.

Inadequate dispersion prevents pigments from fully expressing their inherent color strength and transparency, causing colors to appear dull and less vibrant. At the same time, system instability can trigger pigment flocculation and viscosity fluctuations, leading to uneven print colors and batch-to-batch variations that undermine product consistency.

Traditional dispersion processes often require extended grinding times to achieve target fineness specifications. This results in high energy consumption, prolonged equipment occupancy, and limited production capacity — all of which directly increase manufacturing costs.

To systematically solve the problems outlined above, you need a dispersant — or a combination of dispersants — that can simultaneously deliver efficient wetting, powerful de-flocculation, and long-term steric hindrance stabilization.

Anjeka provides proven solutions tailored to the specific characteristics of different ink systems.

In ceramic ink systems, for example, dispersants such as Anjeka 6042A and 6042B can significantly reduce the centrifugal sedimentation rate of the ink.

For solvent-based, water-based, and UV inkjet inks, Anjeka 6881 provides excellent long-term storage stability while preventing viscosity drift. Its superior de-flocculation capability produces pigment pastes with smaller particle sizes and narrower particle size distributions — which significantly shortens filtration time and reduces the risk of nozzle clogging.

Effective dispersion means that each pigment particle is fully separated and stabilized, maximizing its color strength and transparency.

The result is fuller, brighter, more consistent print colors that meet the demanding requirements of modern printing applications.

These polymeric dispersants effectively reduce the viscosity of the grinding paste and improve its fluidity. This shortens the grinding time required to reach the target fineness specification.

By adjusting the dosage of Anjeka 6042A, for example, formulators can find an efficiency balance point while simultaneously optimizing overall performance.

Anjeka's additive solutions are widely used across various ink systems.

These products have been validated through extensive laboratory testing and real-world production use, providing reliable performance across a range of formulations and operating conditions.

Follow these four steps to systematically improve your ink formulation:

Ink may be small, but it plays an outsized role in print quality and production efficiency. Choosing the right dispersion additive is a critical step in solving the challenges of sedimentation, color inconsistency, and high production costs.

Anjeka is deeply rooted in the specialty chemicals field, with extensive application experience and a comprehensive experimental database for ink additives. We are committed to being your technical partner in creating more stable, more vibrant, and more efficient ink products.