Choosing pigments for plastics and masterbatch is different from choosing a color for paint or ink. The pigment must survive extrusion or molding temperature, disperse evenly in the polymer, resist migration or bleeding, and keep the target shade after processing.
For B2B buyers, the fastest way to avoid mistakes is to define the resin and process first, then shortlist pigment grades by heat resistance, dispersibility, migration resistance, light fastness and documents. This guide explains the practical checks Fortune Chem uses when helping customers compare pigments for plastics and masterbatch applications.
Quick checklist for plastic pigment selection
Before requesting samples, prepare these details:
- Polymer or carrier resin: PE, PP, PVC, PS, ABS, EVA, PA, PET, PC or another material.
- Process: injection molding, extrusion, film, fiber, sheet, blow molding or masterbatch compounding.
- Processing temperature: barrel temperature, residence time and whether the pigment will face repeated heat history.
- Target shade: full shade, tint shade, opacity, transparency and color standard.
- Performance target: light fastness, weather resistance, migration resistance, heat stability, chemical resistance or food-contact document needs.
- Commercial details: sample quantity, annual volume, packing, destination market and required documents.
If only one point is available, start with the resin and processing temperature. Those two inputs decide which pigment grades can stay on the shortlist.
Pigment powder vs masterbatch
Plastic color can be added as dry pigment powder, pigment preparation or masterbatch. Each option has a different role in production.
| Option | What it is | Main advantage | Watch point |
|---|---|---|---|
| Pigment powder | Dry pigment added directly or during compounding | Flexible and often cost-effective for experienced compounders | Requires strong dispersion control and dust handling. |
| Pigment preparation | Pre-dispersed pigment in a compatible system | Easier metering and more consistent dispersion than raw powder | Carrier compatibility must match the polymer and process. |
| Masterbatch | Concentrated pigment or additive in a carrier resin pellet | Clean dosing, consistent color and easier production control | The carrier resin and let-down ratio must fit the final plastic. |
Masterbatch producers usually focus on pigment powder quality, dispersion behavior, heat stability and carrier compatibility. Plastic product factories often prefer masterbatch when they need cleaner handling and more stable color in daily production.
Start with resin and processing temperature
A pigment that works in PE or PP may fail in a higher-temperature engineering plastic. Heat resistance should be checked before shade approval, not after a color match is finished.
| Plastic system | Typical selection focus | Buyer note |
|---|---|---|
| PE and PP | Heat resistance, dispersion, migration, light fastness | Common for packaging, household products, film and general masterbatch. |
| PVC | Heat stability, plate-out risk, migration, chemical resistance | Confirm compatibility with stabilizers and plasticizers. |
| PS and ABS | Heat resistance, dispersion, color strength, gloss | Useful for molded products where color consistency is visible. |
| PA, PET and PC | High heat resistance, chemical stability, color change after processing | Use higher-performance pigments and test under actual residence time. |
| Outdoor plastics | Light fastness, weather resistance, heat aging, migration | The pigment, stabilizer package and polymer all affect durability. |
Use the product TDS as the first screen, then confirm the pigment in the buyer's actual process. A short lab test at nominal temperature is useful, but production trials should also check residence time, screw shear and color shift after reprocessing when relevant.
Key performance criteria
For plastics and masterbatch, color strength alone is not enough. A pigment must also process cleanly and remain stable in the finished product.
| Selection factor | What to check | Why it matters |
|---|---|---|
| Heat resistance | Maximum processing temperature and color change after heat exposure | Prevents shade drift, darkening or decomposition during extrusion and molding. |
| Dispersibility | Specks, filter pressure, color strength after standard dispersion | Poor dispersion causes visible defects and inconsistent masterbatch quality. |
| Migration or bleeding | Contact staining, plasticizer compatibility and storage stability | Important for PVC, flexible plastics, packaging and parts touching other materials. |
| Light fastness | Resistance to fading under light exposure | Needed for outdoor products, toys, consumer goods and visible molded parts. |
| Weather resistance | UV, heat, humidity and outdoor exposure behavior | Critical for exterior plastic products and long-life applications. |
| Warpage and shrinkage | Dimensional change in molded parts | Some organic pigments can influence crystallization or shrinkage in polyolefins. |
| Documents | TDS, SDS/MSDS, COA and market-specific declarations | Required for buyer approval, safety review, customs and regulated markets. |
The right shortlist depends on the final use. A pigment for black injection-molded parts, a bright PP masterbatch, a PVC cable compound and a PA engineering plastic may all need different checks.
Organic vs inorganic pigments in plastics
Organic pigments are often selected for bright shades and high color strength. They are useful for red, yellow, orange, blue, green and violet plastics where strong chroma is needed. High-performance organic grades can also offer strong heat resistance and light fastness.
Inorganic pigments are often selected for opacity, mineral-based durability, weather resistance or specific industrial color families. Some inorganic pigments can be useful when hiding power or heat stability is more important than maximum brightness.
| Pigment type | Common strengths in plastics | Watch points |
|---|---|---|
| Organic pigments | Bright shades, high tinting strength, broad color range, lower loading in many shades | Heat resistance, migration and warpage vary by grade. |
| Inorganic pigments | Opacity, weather resistance, heat stability, chemical durability | Shade range may be less bright; some families need stricter compliance review. |
Do not choose by organic or inorganic label alone. Compare the exact C.I. pigment grade, heat data, application recommendation and final resin test. For a deeper comparison, see Organic Pigment vs Inorganic Pigment.
Fortune Chem product examples for plastics
Fortune Chem product pages list plastic suitability, heat resistance and light fastness to help buyers build a first shortlist. These examples are starting points for lab testing:
| Need | Example grades | Why buyers may review them |
|---|---|---|
| High heat yellow | Pigment Yellow 150, Pigment Yellow 110 | Listed heat resistance up to 300-320 C with plastic suitability. |
| Durable red | Pigment Red 254, Pigment Red 122 | High-performance red options with strong heat and light fastness data. |
| Violet or shading | Pigment Violet 23, Pigment Violet 19 | Useful for violet shades, blue-red correction and high-strength color work. |
| Blue and green plastics | Pigment Blue 60, Pigment Blue 15:3, Pigment Green 7 | Common blue/green families for plastics and masterbatch selection. |
| Heat-stable orange | Pigment Orange 64, Pigment Orange 36 | Orange options for buyers comparing heat resistance and light fastness. |
| Inorganic blue | Pigment Blue 29 | Ultramarine blue option where inorganic pigment properties fit the application. |
Final approval should always happen in the buyer's own resin, equipment and let-down ratio. A pigment that passes color matching may still fail if dispersion, heat aging, migration or dimensional stability is not checked.
Dispersion and masterbatch quality checks
Masterbatch quality depends heavily on dispersion. Poorly dispersed pigment can create specks, weak color strength, high filter pressure, unstable let-down color and complaints in molded or extruded parts.
When comparing pigment samples for masterbatch, test:
- wetting behavior in the carrier resin;
- twin-screw or single-screw compounding conditions;
- filter pressure or screen pack buildup when relevant;
- specks and agglomerates in film, sheet or molded plaques;
- color strength at the target let-down ratio;
- batch-to-batch shade consistency;
- storage stability and moisture control.
For film, fiber and thin-wall parts, dispersion defects are more visible. In those applications, use stricter filtration, plaque or film inspection before approving a pigment for bulk use.
Migration, bleeding and contact staining
Migration resistance is important when the colored plastic touches another material, contains plasticizer, or is used in packaging, toys, cables or consumer goods. A pigment can look correct after molding but later stain adjacent materials or show bleeding under heat and pressure.
Ask the supplier whether the pigment is recommended for the target resin and end use. Then run contact staining, heat aging and storage tests that match the final product. For flexible PVC and plasticized systems, migration checks should happen early because a late failure can force a full color reformulation.
Documents to request before bulk purchase
Before moving from sample to production order, request:
- TDS with heat resistance, light fastness and application recommendations;
- SDS or MSDS for handling and safety review;
- COA for batch-specific quality data;
- sample reference or shade card when color matching is required;
- compliance declarations requested by the destination market or final customer;
- recommended storage and packaging information.
If the finished plastic has food-contact, toy, electrical, automotive or export-market requirements, state them before sample approval. Document requirements can change the pigment shortlist.
Practical selection workflow
Use this workflow for a new plastics or masterbatch project:
- Define the polymer, process and maximum processing temperature.
- Confirm the target shade, opacity, loading and let-down ratio.
- Shortlist pigments by plastic suitability, heat resistance, light fastness and migration needs.
- Request TDS, SDS/MSDS, COA and samples.
- Compound or mold test plaques under real process conditions.
- Check shade, dispersion, specks, heat aging, migration, warpage and storage stability.
- Confirm final documents and commercial terms before bulk order.
If you are not sure where to start, send Fortune Chem the resin type, processing temperature, final application, target shade and document requirements. The team can recommend suitable grades from the plastics pigment application table and arrange samples for evaluation.
Recommended next step
Review pigments for plastics first, then compare candidate products by heat resistance, light fastness and plastic suitability. For related application decisions, also read How to Choose Pigments for Coatings if your project includes coated plastic parts or powder coating on plastic-compatible components.
Frequently Asked Questions
What is the most important factor when choosing pigments for plastics?
Start with the polymer and processing temperature. A pigment must survive extrusion or molding conditions before shade, price and other performance factors can be approved.
What is the difference between pigment powder and masterbatch?
Pigment powder is the dry colorant, while masterbatch is a concentrated pigment or additive dispersed in a carrier resin pellet. Masterbatch is usually cleaner and easier to dose, while pigment powder gives compounders more formulation flexibility.
Which pigments are suitable for high-temperature plastics?
High-temperature plastics need pigments with suitable heat resistance and low color shift under the actual residence time. Fortune Chem grades such as Pigment Yellow 150, Pigment Red 254, Pigment Blue 60 and Pigment Violet 23 can be reviewed as starting points, then tested in the buyer's resin.
Why is migration resistance important in plastic pigments?
Migration resistance helps prevent bleeding, contact staining and color transfer when the plastic touches other materials or contains plasticizers. It is especially important for flexible PVC, packaging, toys, cables and consumer products.
What documents should I request for plastic pigment sourcing?
Request TDS, SDS or MSDS, COA, sample references and any compliance declarations required by the destination market or final customer before moving to bulk purchase.
