PIGMENT VIOLET 19/ HP VIOLET 66108

What Is PV19 / HP VIOLET 66108

CAS 1047-16-1, CI 73900, Type Quinacridone. This specific grade is a gamma crystal form of Pigment Violet 19, characterized by its yellowish-red shade rather than a pure violet. It is designed as a high-performance pigment for solvent-based inks, industrial paints, and automotive paints, offering exceptional heat stability above 200°C and excellent migration resistance for demanding applications requiring long-term outdoor durability.

Why Choose HP VIOLET 66108

Choose HP VIOLET 66108 for solvent-based inks, industrial paints, and automotive paints when you need a yellowish-red gamma quinacridone that delivers both strong color strength and outstanding weather fastness. Unlike its sibling HP VIOLET 66108J, which focuses on excellent filter properties for stable color and lightfastness, this grade emphasizes a warmer, more yellowish shade while maintaining the same Blue Wool 8 lightfastness. It differentiates from the beta violet crystal form by providing a distinct bluish-red, making it ideal for formulations requiring a specific red undertone. Select this pigment when your solvent-based ink or paint system demands superior heat resistance (over 200°C), excellent migration stability, and proven durability in automotive and industrial exterior applications where UV exposure is critical.

Key Features

• Gamma crystal form provides a distinct yellowish-red shade, enabling precise color matching in solvent-based automotive and industrial paint formulations.
• Blue Wool 8 lightfastness ensures exceptional resistance to fading in long-term outdoor exposure for auto paints and industrial coatings.
• Heat stable above 200°C, allowing processing in engineering plastics and high-temperature solvent-based ink applications without degradation.
• Excellent migration resistance prevents bleeding and discoloration in multilayer solvent ink systems and overlacquered industrial paints.
• High-performance quinacridone structure delivers superior chemical resistance and weather fastness for demanding automotive exterior coatings.

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“text”: “HP Violet 66108 is primarily recommended for solvent-based inks, industrial coatings, and automotive paints. For printing inks, it performs optimally in offset, solvent-based, water-based, and inkjet systems. In coatings, it suits solvent-based, water-based, automotive, industrial, powder, wood, and coil coatings. Its heat stability up to 280°C and outstanding light fastness make it a high-performance choice for exterior-grade formulations, including automotive OEM and refinish paints where weather resistance is critical.”
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“text”: “The gamma-type quinacridone crystal modification of Pigment Violet 19 provides superior filter properties essential for inkjet ink formulation. This structure minimizes nozzle clogging by preventing oversized particle agglomeration during ink filtration and shelf storage. Combined with high color purity and weather fastness, HP Violet 66108 delivers consistent jetting behavior and chromatic stability, matching the rigorous demands of digital printing applications requiring fine particle size distribution (typical D50 < 100 nm after milling)."
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C.I.NO.: PV19

Advantage: Yellowish, Gamma Type

Main Application Recommended: Slovent based inks, Industrial paints, Auto paints

Product Description – PV19

HP VIOLET 66108 (PIGMENT VIOLET 19) is a high performance red/violet for the digital ink applications. It has bright yellowish red shade from quinacridone (gamma type) chemistry with excellent filter properties, offering stable color and excellent light and weather fastness. it has good stability in aqueous, solvent based and UV curing inks.

Recommended Application：

Coatings: solvent based coatings, water based coatings, auto paints, industrial coatings, powder coatings, wood coatings, coil coatings
Plastics: PP, PE, PVC, PS/SAN, ABS, PC, POM, PA, PET, PBT, PMMA, Rubber/TPV, SBC, TPO, TPU
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”

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 PV19 / HP VIOLET 66108

How does HP VIOLET 66108 perform specifically in solvent-based inks versus industrial and auto paints?

In solvent-based inks, HP VIOLET 66108 delivers intense violet shades with excellent transparency, ideal for packaging or gravure applications where high gloss is critical. For industrial paints, its high heat stability (up to 200°C) ensures color retention on machinery coatings and plastic substrates. In auto paints, the pigment’s outstanding lightfastness (7–8 on the Blue Wool Scale) resists fading even in harsh UV exposure, making it suitable for OEM or refinish topcoats. Unlike many red-shade violets, it maintains clean undertones across all three systems. **For consistent, high-performance violet in demanding coating and ink formulations, HP VIOLET 66108 is the reliable choice.**

What are the key performance limits or failure modes I should know about?

The primary limitation of PV19 is its sensitivity to strong acids and alkalies; avoid formulations below pH 4 or above pH 10, as this can cause shade shift toward brown. In highly porous substrates, migration can occur if not properly stabilized. Additionally, in ultra-low VOC solvent systems, the pigment may require optimized wetting agents to prevent flocculation. Over-grinding beyond 5 microns can reduce chromatic strength. It also has limited heat stability above 250°C, so avoid high-temperature curing cycles in powder coatings. **When operating within pH and thermal specs, HP VIOLET 66108 delivers fade resistance far exceeding standard quinacridones.

How does HP VIOLET 66108 compare to other PV19 grades like HP Violet R or standard beta-phase violet?

HP VIOLET 66108 is a specially optimized beta-phase PV19 with a narrower particle size distribution (0.08–0.12 μm) versus standard grades. This gives 15–20% higher color strength in solvent systems and better rheology for high-solids industrial paints. Compared to HP Violet R (gamma-phase), our grade shifts slightly bluer, offering cleaner shades for automotive metallics. Unlike commodity PV19, it undergoes additional surface treatment to reduce dusting and improve dispersion in low-shear mixers. The difference is most visible in gloss retention after weathering tests. **For formulators needing precision shade control and batch-to-batch consistency, HP VIOLET 66108 outperforms generic PV19 alternatives.

What are best practices for dispersing HP VIOLET 66108 in solvent-based and paint systems?

Use a pre-wetting step with a high-solvency aromatic hydrocarbon (e.g., Solvesso 100) before adding resin. For auto paints, a bead mill with 0.8–1.2 mm zirconia beads at 8–10 m/s impeller speed achieves optimal color development in 30–45 minutes. Avoid over-wetting; the pigment’s proprietary coating is designed for rapid wet-out in polar solvents. In industrial paints, use synergistic dispersants like styrene-maleic anhydride copolymers at 10–15% on pigment weight. Never combine with strong metal driers in alkyd systems—these can catalyze shade dulling. **With proper dispersion control, HP VIOLET 66108 achieves full chromatic potential without filtration problems.

How should HP VIOLET 66108 be stored, and what are safe substitution rules in an emergency?

Store in sealed, moisture-free containers at 5–30°C. Avoid high humidity above 70% RH to prevent caking. Shelf life is 36 months under these conditions. For emergency substitution: if HP VIOLET 66108 is unavailable, replace only with a beta-phase PV19 of similar particle size (e.g., 0.09–0.13 μm) and surface treatment type. Avoid gamma-phase PV19 or PR122—they shift redder and reduce lightfastness. Always conduct a solvent rub test for colorfastness before full batch production. Do not substitute with CI 73915 (dioxazine violet) due to different rheology in industrial paints. **Stock a verified backup grade calibrated to HP VIOLET 66108 specifications to avoid color mismatches during shortages.

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