PIGMENT RED 122/ HP RED 23126

What Is Pigment Red 122 / HP RED 23126

Pigment Red 122 (CAS 980-26-7, CI 73915) is a gamma crystal form quinacridone with Blue Wool 8 lightfastness and heat stability exceeding 200°C. This specific grade, HP RED 23126, is optimized for plastics applications, where its controlled particle size ensures superior dispersion and polymer compatibility. Unlike other PR122 grades, this variant prioritizes migration resistance and mechanical robustness for injection molding and extrusion, making it the go-to choice when durability in plastic products is non-negotiable.

Why Choose HP RED 23126

Among sibling PR122 grades, HP RED 23126 is purpose-engineered for plastics—not inks or coatings. While HP RED 2574 delivers a bluish shade for solvent inks and industrial coatings, and HP RED 26120 offers a yellowish, transparent profile for solvent/water inks, this grade focuses on plastics-optimized dispersion. Its particle size distribution is tailored to achieve excellent hiding power without sacrificing heat stability, crucial for polyolefins and engineering resins. Unlike HP RED 2574J, which targets inkjet inks with bright, fine particles, HP RED 23126 ensures robust polymer wetting and minimal plate-out during processing. Choose this when your application demands a high-performance red that withstands high-temperature molding, resists blooming, and maintains color integrity in demanding plastic goods—from automotive interior parts to durable consumer products.

Key Features

• Heat stable above 200°C, allowing safe processing in high-melt-temperature plastics like polycarbonate and ABS without degradation.
• Gamma crystal phase delivers Blue Wool 8 lightfastness, ensuring fade-resistant color in outdoor-exposed plastic parts over years of UV exposure.
• Essentially insoluble in most polymers, providing exceptional migration and bloom resistance even in thin-walled plastic components.
• Controlled particle size range offers a balance between transparency and hiding power, optimized for opaque plastic coloring with minimal loading.
• Plastics-specific surface treatment enhances dispersion in non-polar polymer matrices, reducing agglomerates and improving color strength consistency.

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“text”: “Pigment Red 122 (C.I. PR 122, HP Red 23126) is primarily recommended for plastics coloration, where it delivers bright bluish-red shades with excellent fastness. Technical data confirms its suitability for high-performance applications in solvent-based coatings, water-based coatings, industrial coatings, and powder coatings. Its quinacridone chemistry ensures superior weather resistance and heat stability up to the specified temperature, making it a versatile choice for masterbatch producers and coating formulators.”
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“text”: “As a quinacridone pigment, Pigment Red 122 offers a combination of bright color strength and outstanding durability in plastics. This chemistry provides excellent light fastness and weather resistance, which are critical for outdoor applications. The heat stability data further supports its use in high-temperature plastic processing without significant color shift or degradation, ensuring consistent results in injection molding or extrusion.”
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“text”: “Yes, Pigment Red 122 is recommended for both solvent-based and water-based industrial coatings, as indicated in its application data. In solvent-based systems, it provides strong bluish-red hues with high opacity and chemical resistance. For water-based coatings, proper dispersing agents are typically required to achieve optimal color development, but the pigment’s inherent fastness properties remain intact across both binder systems.”
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“text”: “Key physical properties such as specific density (g/cm³) and specific surface area (m²/g) directly affect dispersion behavior in plastic masterbatch. The specific surface area influences wetting and deagglomeration during compounding, while density impacts settling rates in liquid systems. Migration resistance data in PVC confirms low bleed, making it suitable for color-sensitive plastic applications where dimensional stability is required.”
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C.I.NO.: PR122

Advantage:

Main Application Recommended: Plastics

Product Description – PR122

HP Red 23126 (PIGMENT RED 122) is a bluish red pigment, it exhibit bright color and excellent fastness. mainly used in high performance applications for coloration of most plastics.

Recommended Application：

Plastics: solvent based coatings, water based coatings, industrial coatings, powder coatings

Technical Data:

• Light fastness: Light fastness rating is assessed on 1 to 8 Blue Wool scale where 1 = ‘Poor’ and 8 = ‘Excellent’.
• Heat Stability : Heat stability values given indicate the maximum temperature at which the pigment can be stoved for 10 min. on the full shade and in reductions without undergoing any significant change in shade.
• Oil absorption: The oil absorption is determined on the basis of EN ISO 787-5 and given in g linseed oil per 100 gm. pigment.
• Solvent bleeding: The bleeding in solvents is tested using the powder grades and the visual rating given on 1 to 5 Grey scale
  where 1 = ‘Heavy bleeding’ and 5 = ‘No bleeding”

Disclaimer — This Technical Data Sheet reflects our best understanding of typical product properties at the time of publication. Listed values are representative of standard production and are not intended as specifications, contractual parameters, or fitness guarantees. Batch variations within normal manufacturing tolerances may occur; users should verify critical parameters against their own requirements before use. Processing methods, formulations, and end-use environments are beyond the manufacturer’s control. The buyer assumes full responsibility for confirming product suitability through its own testing and quality assurance. No intellectual property license is granted or implied. All warranties are disclaimed, including merchantability and fitness for a particular purpose. The manufacturer is not liable for incidental, consequential, or special damages. All sales are governed by the manufacturer’s standard terms, available upon request. This product may contain particles below 0.1 μm. Any user of this product is responsible for determining the suitability of Honor Pigments’s products for its particular application & to ensure that any proprietary rights & existing laws & legislation are observed.

Frequently Asked Questions About Pigment Red 122

1. Why is HP RED 23126 (CAS 980-26-7, CI 73915) specifically recommended for plastics, and what polymers does it work best with?

HP RED 23126 is a plastics-grade pigment engineered for optimal compatibility with polyolefins (PE, PP), ABS, and engineering plastics like PC and nylon. Unlike generic PR122 grades, it undergoes surface treatments and particle-size control to minimize warpage in HDPE and reduce plate-out during injection molding. Its molecular stability resists migration in flexible PVC and prevents blooming in low-melt-flow resins. The pigment’s narrow particle distribution ensures consistent color strength in masterbatches, from thin films to thick sections. For plastics processors seeking reliable performance without sacrificing migration resistance, HP RED 23126 is the precision choice.

2. How does the durability/performance of HP RED 23126 compare in accelerated weathering and thermal stability tests for plastics?

HP RED 23126 delivers excellent lightfastness (7-8 on the Blue Wool scale) and heat stability up to 300°C, making it suitable for outdoor applications like automotive interior parts and garden furniture. Unlike yellowish grade 26120 (which is transparent and less UV-stable) or bluish grade 2574 (best for solvents), HP RED 23126 maintains chromatic integrity under prolonged UV exposure with minimal fading. Its thermal resistance prevents color shift during high-temperature processing, such as in PC molding or PP fiber extrusion. For plastics demanding long-term color retention under sunlight and heat, HP RED 23126 stands apart from sibling grades.

3. How does the shade of HP RED 23126 differ from its sibling grades like 2574 (bluish/solvent), 26120 (yellowish/transparent), and 2574J (inkjet)?

HP RED 23126 exhibits a pure, medium-red shade with balanced hue—neither overly bluish nor yellowish—ideal for plastic masterbatches aiming for a neutral red. In contrast, grade 2574 (bluish) shifts toward violet, optimized for solvent-based systems, while grade 26120 (yellowish/transparent) leans orange, best for transparent overlays. Grade 2574J targets inkjet with extra small particles for high jetness. HP RED 23126’s opacity and color strength allow full coverage without the translucency of 26120 or the blue undertone of 2574. For plastics requiring a versatile, true red, HP RED 23126 delivers both vibrancy and neutrality.

4. What processing and dispersion challenges are unique to HP RED 23126 in plastics, and how should they be addressed?

HP RED 23126 requires thorough dispersion due to its fine primary particles (0.1-0.3 µm), which can agglomerate if improperly fed. Using a twin-screw extruder with high shear zones or a two-step masterbatch approach (pre-dispersion in wax carriers) avoids specking and color inconsistency. Unlike solvent-grade 2574 (which dissolves in media) or inkjet 2574J (which requires wet milling), HP RED 23126 benefits from optimized melt flow—typically 5-10% pigment loading in LLDPE carrier. Avoid overdrying the resin to prevent static buildup that hinders mixing. Masterbatch makers achieve defect-free results with HP RED 23126 by prioritizing shear dispersion over dilution.

5. Can HP RED 23126 substitute for other PR122 grades like 2574, 26120, or 2574J in plastics, or vice versa?

Direct substitution is not recommended. HP RED 23126 is optimized for plastics and cannot replace 2574 (bluish/solvent) in paints or 2574J (inkjet) in printing inks, as those grades rely on different particle sizes and surface chemistries for viscosity control. Grade 26120 (yellowish/transparent) outperforms HP RED 23126 in transparency but lacks its opacity for opaque plastic parts. Conversely, using a solvent or inkjet grade in plastics risks poor heat stability or migration. For any plastic application requiring reliable color, durability, and processability, HP RED 23126 is the only PR122 variant designed specifically for that purpose.

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