How to Choose Pigments for Coatings

Choosing pigments for coatings is not only a color decision. The right grade has to match the coating system, processing temperature, outdoor exposure, hiding power target, dispersion method and compliance documents required by the buyer.

For industrial buyers, the most efficient approach is to define the application first, then shortlist pigments by measurable performance. This guide explains the practical checks Fortune Chem uses when helping customers compare pigments for coatings.

Quick checklist for coating pigment selection

Before asking for price or samples, prepare these six points:

• Coating system: solvent-based coating, water-based coating, powder coating or another resin system.
• Target shade: full shade, tint shade, opacity, transparency and whether the color must match an existing standard.
• Exposure conditions: indoor use, outdoor use, UV exposure, weathering, chemicals, humidity or heat.
• Processing conditions: baking temperature, extrusion temperature for powder coating, milling equipment and dispersion time.
• Regulatory documents: TDS, SDS/MSDS, COA and any market-specific compliance request.
• Commercial requirement: sample quantity, annual consumption, packaging preference and delivery schedule.

If any of these points are unknown, start with the coating system and target shade. Those two inputs usually narrow the pigment family quickly.

Start with the coating system

A pigment that works well in one coating system may not be the best choice in another. Resin compatibility, wetting, dispersibility and application temperature all affect the final film.

For example, Pigment Blue 60, Pigment Red 254 and Pigment Violet 23 are strong candidates when high heat resistance and coating suitability are priorities. Final approval still needs lab testing in the buyer's own resin and process.

Match shade, opacity and color strength

The same color family can include pigments with very different behavior. Organic pigments are often selected for bright shades and high color strength. Inorganic pigments are often selected for opacity, weather resistance or specific industrial performance.

When comparing samples, evaluate both full shade and tint shade. A pigment can look strong in full shade but shift when reduced with titanium dioxide or used at lower concentration. If the coating must match a customer color card, send the target standard together with the resin system and film thickness.

For yellow and orange coatings, buyers often compare heat-stable grades such as Pigment Yellow 150, Pigment Yellow 110 and Pigment Orange 64. For red coatings, Pigment Red 122 and Pigment Red 254 are useful references when brightness and durability matter.

Check heat resistance before powder coating trials

Heat resistance is especially important for powder coating and baked industrial coatings. A pigment may pass room-temperature color checks but fail during curing because of shade change, darkening or reduced strength.

Use the product TDS as a first screen, then confirm the pigment under the actual curing schedule. For high-temperature systems, start with grades in the 280-320 C range where available. Fortune Chem product data lists heat resistance values to help buyers create a shortlist before requesting samples.

These examples are starting points, not automatic approvals. Always test dispersion, gloss, hiding power and final color in the finished coating formula.

Evaluate weather resistance and light fastness

For exterior coatings, weather resistance and light fastness are often more important than initial color strength. Poor pigment selection can lead to fading, chalking, shade drift or loss of gloss.

Use light fastness values as an early filter, then run application-specific tests if the project requires outdoor durability. For architectural coatings, industrial maintenance coatings, machinery coatings or outdoor powder coating, ask the supplier whether the grade has been used in similar exposure conditions.

Grades such as Pigment Red 254, Pigment Red 122, Pigment Violet 23, Pigment Blue 60 and Pigment Yellow 150 are useful references when buyers need stronger durability data.

Do not ignore dispersion and milling behavior

Even a high-performance pigment can fail if it disperses poorly in the coating system. Poor dispersion can reduce color strength, gloss and transparency, and it can increase defects such as specks or floating.

When comparing coating pigments, ask for recommended dispersion conditions and test the pigment in your normal milling process. Important checks include:

• wetting speed in the resin system;
• viscosity during dispersion;
• final particle distribution after milling;
• color strength after standard dispersion time;
• storage stability of the pigment paste or finished coating.

For water-based coatings, dispersion stability is especially important. Pigment Green 7, Pigment Orange 36 and selected yellow or red grades can be considered when the product data marks water-based coating suitability, but lab confirmation is still required.

Organic vs inorganic pigments for coatings

Organic and inorganic pigments both have important roles in coating formulation. The better choice depends on the final performance requirement.

A buyer sourcing coatings pigments should avoid a simple organic vs inorganic rule. Instead, compare the actual C.I. pigment grade, application recommendation and documents. For a deeper comparison, see Organic Pigment vs Inorganic Pigment.

Documents to request before bulk order

For B2B coating projects, documentation is part of selection. Before scaling up from sample to bulk order, request:

• TDS for performance values and application recommendations;
• SDS or MSDS for handling, storage and safety information;
• COA for batch-specific quality data;
• shade card or sample reference when color matching is required;
• compliance documents requested by the destination market or customer.

If your project has strict regulatory requirements, state them before sample confirmation. This avoids choosing a technically suitable pigment that later fails document review.

A practical selection workflow

Use this workflow when starting a new coating pigment project:

1. Define the coating system, curing temperature and target shade.
2. Shortlist pigments by application suitability, heat resistance and light fastness.
3. Request TDS, SDS/MSDS, COA and samples for the shortlisted grades.
4. Test dispersion, color strength, opacity, gloss and storage stability in your own formula.
5. Confirm final shade and performance before bulk purchase.

If you are not sure where to start, send Fortune Chem the resin system, shade target, processing temperature and final use. The team can recommend suitable coating pigment grades and documents for evaluation.

Recommended next step

For a fast shortlist, review the full pigments for coatings application page and compare grades by solvent-based coatings, water-based coatings and powder coating suitability. Then request samples for the grades that match your processing temperature and durability target.