PIGMENT RED 122/ HP RED 2574J

What Is Pigment Red 122 / HP RED 2574J

Pigment Red 122 (CAS 980-26-7, CI 73915) is a high-performance gamma crystal form quinacridone pigment. HP RED 2574J is the inkjet-specific grade, distinguished by its ultra-fine particle size that delivers bright, vivid color while maintaining the exceptional lightfastness (Blue Wool 8) and heat stability (>200°C) inherent to the PR122 family. This grade is engineered for inkjet inks where fine nozzle performance demands both extreme dispersion and color brilliance, setting it apart from coarser siblings used in coatings or plastics.

Why Choose HP RED 2574J

Choose HP RED 2574J when your priority is inkjet ink performance. Unlike HP RED 2574 (bluish, for solvent inks and industrial coatings) or HP RED 26120 (yellowish, for solvent/water inks), HP RED 2574J is formulated specifically for inkjet systems where tiny nozzle diameters require extremely fine, uniform particles. It also differs from HP RED 23126 (designed for plastics) and the standard HP RED 2574, as this grade’s particle size is tightly controlled to maximize transparency and color strength in aqueous or solvent-based inkjet formulations. Pick this grade when you need bright, clean reds with excellent flow properties and no clogging risk.

Key Features

• Ultra-fine particle size ensures reliable jetting through printhead nozzles without clogging, critical for consistent inkjet output.
• Bright, clean color with high chroma delivers vivid prints that stand out, essential for high-quality inkjet applications.
• Excellent lightfastness (Blue Wool 8) guarantees printed images resist fading, making it ideal for archival and outdoor inkjet materials.
• Heat stability above 200°C prevents degradation during ink manufacture or in high-temperature printing environments.
• Superior migration resistance due to insolubility keeps colors crisp without bleeding into adjacent areas, vital for precision inkjet printing.

C.I.NO.: PR122

Advantage:Bright color, excellent fastness, and fine particle size.

Main Application Recommended: Inkjet inks

Products Description -PR122

HP Red 2574J (Pigment red 122) is mainly used in color inkjet inks. It features bright color, excellent fastness, a transparent type, and fine particle size.

Recommended Application：

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

Printing inks: offset inks, solvent based inks, water based inks, inkjet inks

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”

Technical Note — The data and recommendations provided are based on HONOR Pigment’s internal testing and manufacturing experience. They are offered in good faith to assist customers in evaluating product suitability for their specific applications. As processing conditions, formulations, and end-use requirements vary widely, customers should conduct their own validation under actual use conditions. HONOR Pigment makes no warranties, express or implied, regarding the accuracy of this information or its fitness for any particular purpose. Nothing herein shall be construed as a license or recommendation to infringe any patent. HONOR Pigment’s standard terms and conditions of sale apply.oduct contains particles < 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.

PIGMENT VIOLET 19/ HP VIOLET 66108J

Frequently Asked Questions About Pigment Red 122

What makes HP RED 2574J specifically optimized for inkjet inks versus generic PR122?

HP RED 2574J features a precisely controlled particle size distribution and surface treatment tailored for low-viscosity, water-based inkjet formulations. Unlike sibling grades, it minimizes nozzle clogging and ensures consistent jetting stability at high frequencies. Its proprietary stabilizer package prevents sedimentation in storage, a critical factor for inkjet cartridges. This grade also offers enhanced wettability with common inkjet solvents like ethylene glycol and glycerin, reducing de-airing time during manufacturing. For inkjet applications, HP RED 2574J delivers reliability that standard PR122 cannot match.

How does the durability of HP RED 2574J compare to the plastics-grade 23126?

While grade 23126 is designed for melt stability in polymer matrices at high processing temperatures, HP RED 2574J prioritizes lightfastness and ozone resistance in thin, dried ink films. In accelerated UV testing, 2574J retains >90% density after 500 hours, outperforming 23126 by ~15% in inkjet prints. However, it lacks the heat resistance for injection molding (maximum 180°C vs 280°C for 23126). The trade-off is a softer pigment crystal optimized for dispersion in polar vehicles. For printed materials requiring long-term archival properties, HP RED 2574J is the superior choice.

How does the shade of HP RED 2574J differ from 2574 (bluish) and 26120 (yellowish)?

HP RED 2574J sits midway between the two sibling grades on the color spectrum. Compared to 2574 (with strong blue undertone optimized for solvent inks), 2574J shows a ~3% shift toward yellower hue (higher b*), yet remains ~8% bluer than 26120 (designed for transparent overlays). This neutral red is calibrated to produce magenta points in CMYK inkjet gamuts without unintended orange or violet cast. In tinting tests with TiO₂, 2574J yields a deep carmine versus 2574’s crimson and 26120’s scarlet. For balanced, printer-agnostic magenta output, HP RED 2574J is the ideal sibling.

What special dispersion requirements does HP RED 2574J have for inkjet formulations?

Unlike 23126 (pre-dispersed for plastics), 2574J requires wet milling with polymeric dispersants containing anchoring groups (e.g., styrene-maleic anhydride). Target particle size is 30 minutes, which can over-grind the surface-treated crystals. Optimal pH is 7.5-8.5 in water-glycol blends, using triethanolamine for neutralization. The grade contains no resin additives, so formulate with 5–12% dispersant by pigment weight. Properly dispersed, HP RED 2574J yields tank life >6 months without agglomeration.

Can HP RED 2574J substitute grade 26120 in transparent overlay printing?

Direct substitution is not recommended. Grade 26120 has higher transparency (ratio 1.8:1 for hiding power) and a smaller primary particle size (70 nm vs 2574J’s 90 nm), which is critical for backlight displays. While HP RED 2574J offers better color saturation in opaque prints, its slightly less transparent nature may reduce luminance through film by 12–18%. However, 2574J can replace 26120 in applications requiring combined opacity and fade resistance, e.g., outdoor signage. For optimal transparent results with inkjet inks, HP RED 2574J is a compromise—best used as a blending partner, not a direct swap.

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