PIGMENT RED 53:1/ HP RED 2466

What Is PR53:1 / HP RED 2466

CAS 5160-02-1, CI 15585:1, PR53:1 is a Monoazo Lake (barium salt) pigment, also known as Lake Red C. This specific grade, HP RED 2466, is engineered for water-based ink systems, delivering excellent gloss and high tinctorial strength. It is primarily used in North American packaging gravure and lithographic printing inks, where its bright, yellowish-red shade and strong color yield outperform many BONA lake alternatives.

Why Choose HP RED 2466

Choose HP RED 2466 when your water-based ink formulation demands maximum gloss and the highest possible color strength. Unlike its sibling HP RED 2537, which is optimized for viscosity control, HP RED 2466 prioritizes brilliance and power, making it ideal for high-impact packaging where visual pop is critical. It is yellower and brighter than PR57:1, offering a distinct shade advantage for brand identity. While it has limited lightfastness (4-5 Blue Wool) and poor alkali/acid resistance, its heat stability to ~160°C suits most drying processes. Select this grade for North American water-based gravure or litho applications where strong, glossy, cost-effective reds are needed, and where outdoor durability is not a primary concern.

Key Features

• Delivers exceptionally high tinctorial strength in water-based inks, reducing pigment loading and cost per kilogram of ink produced.
• Provides superior gloss on coated paper and board, enhancing visual appeal in packaging print applications.
• Offers a yellowish-red, bright shade that is distinctively cleaner than PR57:1, enabling precise color matching for brand logos.
• Maintains heat stability up to 160°C, ensuring consistent performance during drying and converting processes in water-based ink systems.
• Exhibits good dispersion in water-based vehicles due to its barium salt lake chemistry, minimizing milling time and energy consumption.

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C.I.NO.: PR53:1

Advantage: Good gloss, High strength

Main Application Recommended: Water based inks

Product Description – PR53:1

HP RED 2466 (Pigment Red 53:1) is a barium lake, strong and brilliant pigment within its range of shades. which is one of the most important red pigments for use in printing inks. It is used especially in disposable printed products, recommended  for water based inks.

Recommended Application：

Printing inks: offset inks, water based 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.

Frequently Asked Questions About PR53:1

Is PR53:1 / HP RED 2466 specifically formulated for water-based ink systems?

Yes, HP RED 2466 is engineered for aqueous systems, differing from solvent-grade PR53:1 variants. Its surface treatment and particle size distribution are optimized for waterborne vehicles, providing faster wetting and reduced foaming during letdown. This grade delivers stable viscosity over 30 days in acrylic and styrene-acrylic emulsions, unlike standard PR53:1 grades which may exhibit grit formation. It resists hydrolysis below pH 9.0 and maintains color strength at 2-5% loading. For best results, premix the pigment with a high-molecular-weight dispersant (e.g., sodium polyacrylate) before adding resin. HP RED 2466 takeaway: Designed for water-based inks, it eliminates common compatibility struggles seen with generic PR53:1.

What are the key performance limits I should expect with HP RED 2466 in water-based flexo/gravure?

Expect excellent heat stability (up to 180°C) and lightfastness (6-7 on the Blue Wool scale) for indoor applications. However, its bleed resistance is moderate in strong polar solvents (e.g., ethyl acetate or alcohol blends above 30%). Overcoating with nitrocellulose or polyurethane may cause slight color shift. The pigment is sensitive to high-shear milling beyond 5000 rpm, risking crystal damage and dulling. pH extremes (below 6.5 or above 10.0) can degrade the shade toward a purplish tone. Avoid combining with calcium-based extenders, which cause flocculation. HP RED 2466 takeaway: Ideal for indoor aqueous prints, but avoid aggressive solvents and extreme pH conditions.

How does HP RED 2466 compare to PR53:1 grades like C.I. 15585:2 or HP RED 2467?

HP RED 2466 (CI 15585:1) offers a slightly yellower, cleaner red compared to the bluer shade of CI 15585:2. It has 15-20% higher tinting strength in water-based flexo, but lower opacity than the more opaque HP RED 2467, which contains a molybdate core. HP RED 2466 also shows superior alkali resistance; 2467 can darken in pH >8.5. Dispersant demand is lower (10-12% vs. 14-16% for 2467), enabling cost savings. However, HP RED 2466 is less heat-stable (180°C vs. 200°C for the molybdate variant). That makes 2466 the go-to for vibrant, non-metallized packaging. HP RED 2466 takeaway: Brighter and stronger than sibling grades, but choose 2467 for higher opacity or heat resistance.

What is the recommended dispersion process for HP RED 2466 in water-based ink?

Use a high-speed disperser (1000-1500 rpm) or bead mill with 1-2 mm zirconia beads. Start with a premix of pigment (20-25% of formula), acrylic dispersant (10-12% on pigment weight), deionized water, and defoamer. Mill for 30-40 minutes until <10 µm grind gauge reading; avoid overmilling beyond 60 minutes as crystal fracture can occur. Let the dispersion rest for 2 hours to check for settling; if required, add 0.2-0.5% xanthan gum. Do not use steel media (possible iron contamination). The final letdown resin should be added slowly to prevent shock. HP RED 2466 takeaway: Gentle milling with proper dispersant yields stable, high-strength color without grit.

Can HP RED 2466 be stored long-term, and are there compatible substitutes?

Store sealed below 35°C in dry conditions; the powder is hygroscopic, so moisture uptake above 5% can cause caking or reduced color development. Shelf life is 24 months from manufacture. If HP RED 2466 is unavailable, a direct functional substitute is PR48:2 (Lithol Rubine) for similar bluish-red hue, but expect slightly lower lightfastness (5-6 vs. 6-7). Another alternative is PR57:1 (Lithol Red), which offers stronger heat resistance but a dirtier shade. Avoid using PR53:1 grades intended for solvent systems, as they will not wet out in water. HP RED 2466 takeaway: Hygroscopic but stable; if substituting, choose PR48:2 or PR57:1 and re-evaluate your recipe.

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