PIGMENT RED 57:1/ HP RED 2437

C.I.NO.: PR57:1

Advantage: Low viscosity, Good dispersibility

Main Application Recommended: WWWWater$1sed inks

Product Description – PR57:1

HP Red 2473 (PIGMENT RED 57:1) is a vibrant yellowish-red pigment primarily used in wWWWWWWWWater$1sed inks and emulsion paints. Renowned for its excellent viscosity and outstanding storage stability, it delivers consistent, high-quality color performance, making it an ideal choice for applications requiring vivid hues and reliable long-term stability.

Recommended Application：

Printing inks: offset inks, wWWWWWWater$1sed 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 — PIGMENT RED 57:1

What is the specific CI number and chemical formula for PIGMENT RED 57:1, and how does its structure affect performance in water-based inks?

The CI number for this pigment is PR57:1 (CAS N/A, C.I. Constitution No. listed as Pigment Red 57:1), with a chemical formula of C18H12CaN2O6S. This calcium salt of a monoazo pigment provides a vibrant yellowish-red shade and is specifically processed for water-based ink systems. Its chemical structure contributes to low viscosity in aqueous dispersions, allowing for higher pigment loading without compromising flow behavior—critical for high-speed printing applications where maintaining stable rheology is essential.

How does PR57:1 maintain low viscosity and good dispersibility in water-based ink formulations?

HP RED 2437 (Pigment Red 57:1) is designed to deliver exceptionally low viscosity in aqueous dispersions, ensuring excellent flow properties even at elevated pigment concentrations. Its particle surface chemistry promotes rapid wetting in water-based acrylic and styrene-acrylic binder systems, forming stable suspensions with minimal settling. This characteristic is directly tied to its EINECS/ELINCS registration (available in technical data sheet) and specific density (g/cm³) parameters, which optimize dispersion stability while maintaining the clean, bright red shade required for packaging and publication inks.

What are the main application recommendations and storage stability performance for PR57:1 in printing inks?

PR57:1 is primarily recommended for water-based printing inks and emulsion paints, where its low viscosity and outstanding storage stability deliver consistent color performance over time. For offset inks, the pigment’s balanced rheology enables high-speed press operation without misting or flow issues. Its specific surface area (㎡/g) and density characteristics ensure batch-to-batch consistency, while the absence of bleeding in xylene or methyl ethyl ketone (as per technical data) confirms solvent resistance suitable for multi-layer printed structures. The product maintains stable color strength and shade even after prolonged storage in sealed containers.

Is PR57:1 suitable for use in emulsion paints, and what specific advantages does it offer in that application?

Yes, Pigment Red 57:1 is highly suitable for emulsion paints, delivering vibrant reddish-yellow shades with excellent storage stability. Its low viscosity profile enables easy incorporation during the letdown phase without excessive shear, while good dispersibility ensures uniform color distribution across different binder systems. The pigment’s lightfastness and heat stability (℃) parameters, though primarily designed for indoor applications, provide reliable performance in water-based architectural coatings. For formulators, HP RED 2437 offers a distinct shade option between deeper reds and yellower shades, expanding the color gamut without requiring additional dispersing agents.

How does the global supply and substitution landscape for PR57:1 affect procurement strategy for ink manufacturers?

PR57:1 benefits from globally stable supply chains, with multiple Asian manufacturing bases ensuring reliable availability. The established production infrastructure and consistent quality control (ISO 9001 certified) make HP RED 2437 a cost-effective choice for volume procurement. When considering substitutions with other red pigments (e.g., PR53:1), formulators should evaluate shade differences—PR57:1 offers a brighter, more magenta-leaning shade versus deeper blue-shade alternatives—while also factoring in the specific viscosity and dispersibility advantages in water-based systems. Given the stable pricing trends and established application data from major ink producers, PR57:1 remains a benchmark product for water-based red shades in 2024-2025 formulation cycles.