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Home / News / Industry News / How Does a Dispersant Balance Colour Development, Stability, and Durability?
Industry News
Dispersant Technology · Waterborne & Solventborne Systems · DH-6602S
In the production of coatings and inks, whether pigments can be fully wetted and uniformly dispersed directly affects the product's colour expression, gloss, and storage stability. As pigment loading increases, system viscosity tends to rise in parallel, which can easily affect grinding efficiency and application performance. Selecting a dispersant that combines both dispersion and viscosity-reduction capability is therefore important for improving the overall performance of the product.
Section One — Common Problems
Colour Development Not Ideal
Insufficient pigment dispersion causes dark, dull colour and inadequate brightness.
Gloss Reduction
Pigment agglomeration affects film surface uniformity, reducing gloss performance.
High Viscosity in High-Pigment Systems
As pigment loading increases, system flowability noticeably deteriorates.
Insufficient Storage Stability
Settling, re-coarsening, or separation after extended storage.
Section Two — Limitations of Traditional Approaches
Reducing pigment loading or adjusting formulation ratios can lower system viscosity to some degree, but may affect hiding power and tinting strength. By contrast, improving the wetting and dispersion efficiency of the pigment is more helpful for achieving low viscosity, good flowability, and stable storage while maintaining high pigment content.
Section Three — Product Application: DH-6602S
DH-6602S · Dispersant for Waterborne and Solventborne Systems
DH-6602S is a dispersant suitable for both waterborne and solventborne systems. It improves the wetting and dispersion performance of pigments, enabling the system to achieve better colour development and film gloss. Even at higher pigment loadings, it maintains lower viscosity, good flowability, and excellent storage stability.
DH-6602S also has good grinding and dispersion capability for inorganic pigments, fillers, and zinc powder, and helps improve the water resistance and oil resistance of the cured film. It is suitable for a variety of pigment systems and can be widely applied in waterborne and solventborne coatings and related industrial formulations.
Colour Development
Improves pigment de-agglomeration for brighter, more saturated colour expression
Gloss
Better pigment distribution supports improved film surface flatness and gloss
Viscosity Reduction
Maintains lower viscosity at high pigment content — better flow and application performance
Storage Stability
Reduces settling, re-coarsening, and separation during long-term storage
Inorganic & Zinc Powder
Good grinding and dispersion performance for inorganic pigments, fillers, and zinc powder
Film Resistance
Helps improve water resistance and oil resistance of the cured coating film
Section Four — Summary
Excellent pigment dispersion performance is an important foundation for achieving high gloss, strong colour development, and stable storage performance. Selecting an appropriate dispersant not only improves system flowability but also enhances film water resistance, oil resistance, and overall application performance — providing more stable performance support for all types of coating systems.
Frequently Asked Questions
Can DH-6602S be used in both grinding and let-down stages?
Yes — it can be incorporated at the grinding stage for maximum pigment surface interaction, or added during let-down for existing formulations. Adding at the grinding stage generally gives better colour development and storage stability results. The optimal addition point should be evaluated for the specific formulation.
Why does colour development matter beyond appearance — does it affect performance?
Yes — colour development reflects the degree of pigment de-agglomeration. Poorly dispersed pigments form larger particle clusters that scatter light inefficiently, reducing both tinting strength and hiding power. Better dispersion means more of the pigment's inherent optical properties are expressed in the final film, which affects not just appearance but also hiding efficiency and the amount of pigment needed to reach a target colour.
Is DH-6602S suitable for high-pigment-volume concentration (PVC) formulations?
Yes — its viscosity-reduction capability at high pigment loadings makes it particularly relevant for high-PVC formulations where maintaining adequate flowability without sacrificing colour performance is a key challenge. A trial at the target PVC is recommended to establish the optimal dosage.
