Choose a pigment dispersant by matching its chemistry to the pigment surface, the liquid or polymer system, and the way the product will be processed. Then compare candidates in the actual formulation, checking pigment wetting, dispersion quality, viscosity, color development, stability, and compatibility with other ingredients. A dispersant that works well in a waterborne coating may not suit a solvent-based ink or a plastic masterbatch, so there is no universal best choice.
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At NKY Group, we recommend starting with the application requirements rather than selecting by product name alone. Identify the pigment and its surface treatment, define the resin or carrier, and establish the key performance targets before conducting a controlled screening. The steps below provide a practical framework for making that selection and preparing a more useful supplier inquiry.
First, describe the product the pigment will enter: a waterborne or solvent-based coating, a printing ink, or a plastic compound or masterbatch. Note the binder or resin, carrier, other major additives, and the intended manufacturing process. These details matter because the dispersant must function in the complete formulation, not just alongside the pigment in isolation.
Next, rank the requirements that determine success. A coating may need color consistency, gloss, storage stability, or resistance to flocculation; an ink may place greater emphasis on viscosity, printability, and color strength; and a plastic application may require compatibility with the polymer and downstream processing conditions. If several requirements are equally important, identify which ones are pass-or-fail criteria and which ones are preferences.
Record the pigment’s color index or commercial identity, pigment type, and any surface treatment or coating information available from its supplier. Organic pigments, inorganic pigments, and carbon black can have different surface characteristics, so they may respond differently to dispersant chemistry. Even pigments with similar visual appearance can behave differently during wetting and stabilization.
Also establish whether the pigment is supplied as a powder, paste, or pre-dispersed concentrate. For powders, consider handling and wetting needs as well as dispersion. For concentrates, confirm that the dispersant and carrier remain compatible when the concentrate is let down into the final formulation.
Use the dispersant’s technical information and supplier guidance to screen for compatibility with the formulation medium. A candidate should be considered in relation to its recommended use, active content, physical form, and compatibility information—not just its general description as a pigment dispersant. Confirm the relevant details for the specific grade under consideration.
For waterborne systems, assess whether the candidate is suitable for the formulation’s pH, binder, and other additives. In solvent-based inks and coatings, consider solvent and resin compatibility, along with viscosity and print or application requirements. In plastics, focus on compatibility with the polymer or carrier and whether the dispersant is appropriate for the intended compounding or masterbatch process.
Do not assume that one dispersant can be transferred between these application groups without testing. A change in resin, solvent, pigment grade, or processing sequence can alter the outcome. When the formulation is confidential, a high-level description of the system may still help a supplier identify relevant product families.
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Prepare a small set of trials using the same pigment lot, binder or carrier, mixing equipment, and processing sequence. Change one factor at a time where practical, so that differences can be linked to the dispersant rather than to several simultaneous formulation changes. Follow the candidate product’s current technical guidance for handling and incorporation.
For an initial laboratory screen, a team might compare dispersant additions of 0.5%, 1.0%, and 2.0% on pigment weight as illustrative screening levels—not universal recommendations. Confirm whether the product is supplied as active material or a solution, and calculate the dosage basis consistently. The appropriate range depends on the pigment, dispersant chemistry, active content, and formulation, so use supplier guidance to refine the trial.
Keep processing conditions consistent and record them, including mixing time in minutes, equipment, temperature in °C, and addition order. These are test conditions, not performance guarantees; select values appropriate to the equipment and formulation. A comparison made under uncontrolled or undocumented conditions may be difficult to interpret or repeat.
A promising grind or concentrate result is only an intermediate screen. Test the candidate in the final formulation or let-down, because interactions with binders, solvents, additives, and substrates can change performance. For plastics, assess the material after the relevant compounding and forming steps rather than relying only on a laboratory premix.
Review both immediate and time-dependent behavior. Set storage and evaluation conditions that reflect the intended product and handling environment, and document any changes in appearance, viscosity, or application performance. Avoid interpreting a short laboratory observation as proof of long-term commercial stability.
| Decision | What to Consider | Practical Check |
|---|---|---|
| Pigment type | Surface properties, treatment, and supplied form | Compare candidates using the actual pigment grade |
| Formulation medium | Water, solvent, binder, resin, or polymer carrier | Confirm compatibility in the complete system |
| Processing method | Equipment, sequence, energy input, and temperature | Replicate relevant production conditions where feasible |
| Product targets | Viscosity, color, application behavior, and stability | Use defined acceptance criteria for each priority |
When you contact NKY Group, share the application, pigment identity, formulation medium, binder or resin, processing method, and the performance issue you are trying to solve. Include any target viscosity, color, or stability criteria that can be disclosed, along with the current dispersant or test observations if available. This information helps us discuss suitable product options and identify what should be verified in your laboratory.
For a useful technical review, ask for the product information relevant to your application, including recommended use, active content or supplied form, handling guidance, and compatibility considerations where available. Confirm sample availability, commercial quantities, packaging, and lead time directly with our team, since these details can depend on the product and order requirements. Any candidate should be validated in your own formulation before production adoption.
The right dispersant for pigment is the one that meets your formulation and processing requirements with the actual pigment—not simply the one with the broadest product description. Define the application, confirm pigment and carrier details, screen compatible candidates under controlled conditions, and verify results in the final product. This approach helps reduce selection uncertainty and makes supplier discussions more focused.
Your next step is to prepare a short application brief with the pigment grade, system type, resin or carrier, process, and priority performance targets. Share it with NKY Group to discuss potential options and the information needed for a practical evaluation. Make the final decision from comparative testing and suitability for your production conditions.
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