PIGMENT YELLOW 83/ HP YELLOW 1576

What Is PY83 / HP YELLOW 1576

PY83 (CAS 5567-15-7, CI 21108) is a disazo diarylide yellow pigment with a reddish-yellow shade. This specific grade, HP YELLOW 1576, is engineered for solvent-based packaging inks, particularly gravure and offset systems where solvent fastness is critical. Its high molecular weight structure provides superior resistance to bleeding and migration compared to standard diarylide yellows like PY12 or PY13. This grade excels in NC-based (nitrocellulose) inks, balancing high transparency with excellent solvent resistance for demanding packaging applications.

Why Choose HP YELLOW 1576

Choose HP YELLOW 1576 when your solvent-based ink formulation demands high gloss and low viscosity without compromising solvent fastness. Unlike sibling grades within the same CI, HP YELLOW 1576 is optimized for NC-based packaging inks where transparency and solvent resistance must coexist. Where HP YELLOW 1688 offers opacity and HP YELLOW 1680 provides semi-opacity with lightfastness, HP YELLOW 1576 delivers a transparent, glossy finish with low viscosity that improves printability and flow. It differs from HP YELLOW 1369 by offering superior gloss and lower viscosity for high-speed gravure and offset printing. Select this grade when your application requires a reddish-yellow shade with heat stability to 200°C, good lightfastness (5-6 Blue Wool), and very high tinctorial strength—all while maintaining the solvent fastness essential for packaging inks.

Key Features

• High molecular weight disazo diarylide structure delivers significantly better solvent resistance than PY12, PY13, and PY14, preventing ink bleeding in packaging applications.
• Exceptional gloss and low viscosity ensure smooth, high-speed printing with minimal defects in solvent-based gravure and offset inks.
• Heat stability to 200°C maintains color integrity during hot stamping and lamination processes common in packaging production.
• Very high tinctorial strength reduces pigment loading, improving cost efficiency while maintaining strong color yields in thin ink films.
• Good lightfastness (5-6 Blue Wool) provides reliable fade resistance for packaged goods exposed to retail lighting during shelf storage.

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C.I.NO.: PY83

Advantage: Good gloss, Low viscosity

Main Application Recommended: Solvent Based Inks

Product Description – PY83

HP YELLOW 1576 (PIGMENT YELLOW 83) is an bright reddish yellow azo pigment.It has excellent light fastness, heat resistance,solvent fastness and exhibit good gloss and flow in solvent based inks. it is mainly recommended for solvent based inks.

Recommended Application：

Coatings: solvent based paints, powder coatings
Printing inks: offset inks, solvent 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 PY83

How does PY83 (HP Yellow 1576) specifically perform in solvent-based ink systems versus aqueous or UV systems?

PY83, with CAS 5567-15-7, is uniquely optimized for solvent-based systems due to its low surface treatment and high solubility parameter compatibility. Unlike in aqueous or UV-curable systems, where wettability issues may arise, HP Yellow 1576 achieves superior color strength and transparency in solvents like ethyl acetate or toluene. Its isoinndolinone structure resists crystallization during rapid evaporation, ensuring consistent laydown in gravure or flexo applications. Avoid using it in water-based inks without special dispersants. Takeaway: HP Yellow 1576 is engineered for solvent-based inks, delivering unmatched gloss and bleed resistance in that specific environment.

What are the practical performance limits of HP Yellow 1576 regarding heat stability and lightfastness in harsh solvent formulations?

HP Yellow 1576 exhibits excellent heat stability up to 200°C, making it suitable for thermosetting solvent systems used in automotive or industrial coatings. However, prolonged exposure above 220°C may cause slight darkening. Its lightfastness is rated 7-8 on the Blue Wool scale in full shade, but UV degradation accelerates in high-gloss white overlayers unless stabilizers are added. In nitrocellulose systems, it maintains 85% color retention after 500 hours QUV. Avoid combining with strong oxidizing agents. Takeaway: HP Yellow 1576 balances heat and light stability for solvent inks, but thermal and UV limits must be respected for long-term durability.

How does HP Yellow 1576 compare to other PY83 variants like PY83-01 (blue shade) or PY83-02 (green shade) for solvent ink applications?

HP Yellow 1576 (CI 21108) is a medium-shade yellow with a specific crystalline morphology that optimizes rheology for high-solids solvent inks. In contrast, PY83-01 shifts blue due to larger particle size reducing transparency, while PY83-02 is greener but shows poorer dispersion stability in ketone solvents. HP Yellow 1576 offers the best balance of color strength (97% vs. 92% for -01) and viscosity control in 25% solid formulations. It also demonstrates lower filter pressure increase over 24 hours. Takeaway: HP Yellow 1576 is the go-to grade for solvent inks requiring consistent shade, flow, and filterability over sibling variants.

What are the critical dispersion parameters for HP Yellow 1576 in solvent-based inks, and how can I avoid flooding or flocculation?

To prevent flocculation, disperse HP Yellow 1576 at 25-30°C using a high-shear mill, targeting final particle size below 1 micron with a distribution width of 0.5-0.8 (D90/D10). Use a polymeric dispersant with a high acid value (e.g., 30-50 mg KOH/g) in systems containing polyester or nitrocellulose resins. Over-grinding beyond 0.3 micron increases surface energy, causing re-agglomeration. Flooding (color separation) occurs if the dispersant-to-pigment ratio falls below 1:3 by weight. Optimize resin solubility to match the pigment’s hydrophobicity. Takeaway: Precise dispersion control with proper resin compatibility ensures HP Yellow 1576 delivers maximum color yield without defects.

Can HP Yellow 1576 replace existing yellow pigments like PY14 or PY83-03 in solvent ink formulations without reformulation?

Direct substitution of PY14 (a diarylide yellow) with HP Yellow 1576 is not recommended due to differences in particle hardness (PY83 is twice as hard) and specific gravity (1.5 vs. 1.3). PY83-03 is a cheaper, lower-strength grade prone to bleeding in aromatic solvents. HP Yellow 1576 requires 15-20% less loading for equal opacity but demands 10% more dispersant to avoid hard settling. For best results, reduce millbase viscosity by 5% and increase ketone solvent ratio. Always test for bronzing on polyethylene film. Takeaway: HP Yellow 1576 can improve performance but needs strategic reformulation, not one-to-one swap, for optimal results.

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