PIGMENT RED 49:1/ HP RED 24169

C.I.NO.: PR49:1

Advantage: High color strength

Main Application Recommended: WWWWater$1sed ink, Textile printing

Product Description – PR49:1

HP red 24169 (Pigment Red 49:1) is a barium lake pigment that imparts a neutral red shade. Due to its limited heat resistance and stability, its application in plastics is restricted. It is primarily employed for coloring printing inks, particularly in publication gravure inks, where resin-treated formulations can mitigate the coppering effect. Specialized variants are well-suited for wWWWWWWWWater$1sed inks. As an economical pigment option, it is widely used in inks, as well as in cultural and educational supplies such as watercolors and oil paints, and can also be applied in coatings.

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 49:1

What is the main application advantage of Pigment Red 49:1 (HP RED 24169) in printing inks?

Pigment Red 49:1 (CAS: 1103-38-4) delivers high color strength in printing inks, especially publication gravure and offset inks, due to its optimized crystal structure and fine primary particle size. This barium lake pigment (C40H26N4O8S2·1/2Ba) provides a neutral red shade with excellent tinting power per unit weight, making it cost-effective for high-speed gravure printing. Resin-treated grades further enhance dispersibility in solvent and water-based ink systems, maintaining consistency in batch-to-batch color reproduction.

Can Pigment Red 49:1 be used in water-based inks and textile printing?

Yes, Pigment Red 49:1 is recommended for water-based inks and textile printing due to its good dispersibility and wash fastness on fabric substrates. In water-based systems, the pigment maintains stable color strength and shade without significant settling, provided the pH and binder systems are optimized. For textile printing, it achieves vibrant prints with moderate lightfastness, though its heat stability (≤180°C) limits use in high-temperature curing processes. Always verify compatibility with specific resin systems for best results.

How does the heat stability of PR49:1 affect its use in plastics?

Pigment Red 49:1 has limited heat stability (typically ≤180°C), which restricts its application in plastics where processing temperatures often exceed 200°C. At elevated temperatures, the barium lake structure may degrade, causing shade shift or loss of color strength. Therefore, PR49:1 is not recommended for injection molding or extrusion of polyolefins; it is primarily suited for low-temperature curing ink and paint systems, such as publication gravure inks, where thermal load is minimal.

What is the chemical structure and solubility profile of Pigment Red 49:1?

Pigment Red 49:1 (C.I. Constitution No. 15630:1) has the chemical formula C40H26N4O8S2·1/2Ba, a barium salt of an azo dye with low water solubility (<0.1 g/L) due to the barium lake formation. Its EINECS/ELINCS number is 214-202-6, and specific density is approximately 1.6 g/cm³. The pigment exhibits good resistance to alkali but poor resistance to strong acids, which must be considered when formulating inks or coatings with extreme pH conditions.

Why is resin-treated PR49:1 preferred for publication gravure inks?

Resin-treated Pigment Red 49:1 improves dispersibility and rheology in publication gravure ink vehicles, reducing milling time and preventing flocculation. The resin coating also enhances gloss and transparency in thin ink films, critical for high-speed gravure printing where consistent color laydown is required. Non-treated grades may require additional dispersant optimization, but treated versions offer superior process stability for high-volume production runs.