PIGMENT YELLOW 14/ HP YELLOW 1543

What Is PY14 / HP YELLOW 1543

CAS 5468-75-7, CI 21095, Type: Disazo Diarylide. This grade is a high-transparency intermediate shade yellow between PY12 and PY13, engineered specifically for solvent-based and offset inks. Its higher molecular weight delivers superior solvent fastness, making it the preferred choice for NC-based packaging gravure applications where PY12 would fail due to poor solvent resistance. HP YELLOW 1543 also provides excellent color strength and transparency for high-quality printing results.

Why Choose HP YELLOW 1543

Choose HP YELLOW 1543 when your solvent-based or offset ink formulation demands maximum transparency and low viscosity without sacrificing solvent fastness. Unlike its opaque sibling HP YELLOW 1426, this grade delivers clean, bright prints with deep see-through effects ideal for packaging gravure. It outperforms PY12 in NC-based systems, resisting bleed and migration that ruin PY12 prints. Compared to HP YELLOW 1737, which prioritizes dispersibility, 1543 focuses on maintaining low viscosity for smooth, high-speed press runs. Select this grade when you need a workhorse diarylide yellow that balances transparency, fluidity, and chemical resistance—specifically for solvent inks where PY12 fails and opacity is not desired.

Key Features

• High transparency allows for vibrant overlays and deep shade control in solvent-based and offset ink layers.
• Low viscosity ensures excellent flow and transfer on high-speed gravure and offset presses, reducing ink misting.
• Superior solvent fastness prevents color bleeding in NC-based packaging gravure inks, outperforming PY12.
• Good color strength delivers high tinctorial value with lower pigment loading, improving cost efficiency in offset formulations.
• Intermediate shade between PY12 and PY13 provides precise color matching for brand-specific yellow tones in packaging prints.

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“text”: “PIGMENT YELLOW 14 (HP YELLOW 1543, C.I. Pigment Yellow 14, CAS 5468-75-7) delivers exceptional transparency and low viscosity, making it ideal for high-performance solvent-based inks and offset inks. Its bright red-yellow hue provides high opacity, while heat stability up to 180-200°C ensures reliable performance in drying and curing processes. The superior solvent resistance prevents blooming, critical for maintaining color consistency in packaging and publication printing. With chemical formula C34H30Cl2N6O4 and specific density optimized for ink dispersion, it offers batch-to-batch reliability for demanding formulations.”
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“text”: “PIGMENT YELLOW 14 (HP YELLOW 1543) has a lightfastness rating of 3-4, which is suitable for interior industrial paints and solvent-based coatings where direct sunlight exposure is limited. This rating means the pigment maintains color integrity in indoor environments, with weather resistance adequate for general industrial applications. For exterior or high-UV applications, we recommend evaluating exposure conditions against the pigment’s heat stability (up to 180-200°C) and alkali resistance to ensure long-term performance.”
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“text”: “PIGMENT YELLOW 14 (C.I. Constitution No. 21095, EINECS 226-789-3) is specifically recommended for offset inks due to its combination of transparency, low viscosity, and bright red-yellow shade. The pigment’s chemical structure (C34H30Cl2N6O4) ensures excellent dispensability in oil-based systems, while heat resistance up to 200°C prevents color shift during high-speed printing. Its solvent resistance and anti-blooming performance are critical for maintaining sharp print definition in multi-layer offset applications.”
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C.I.NO.: PY14

Advantage:  Transparency, Low viscosity

Main Application Recommended: Solvent based inks, offset inks

Product Description – PY14

HP YELLOW 1543 (PIGMENT YELLOW 14) is a vibrant, medium-shade diarylide yellow pigment renowned for its bright red-yellow hue, high opacity, and excellent fastness properties, including lightfastness rated at 3-4, heat resistance up to 180-200°C, and superior solvent resistance that prevents blooming or migration. In solvent-based inks, PY14 excels due to its strong transparency options, good gloss, low viscosity, and stability against overpainting and paraffin wax, making it ideal for packaging, publication gravure, and flexographic printing applications where durable, high-color-strength yellow tones are essential for vibrant, long-lasting results. Additionally, its resistance to paraffin further makes it a useful product for packaging inks.

Recommended Application：

Coatings: industrial paints, solvent based 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 PY14

How well does PY14 / HP Yellow 1543 actually perform in solvent-based inks versus offset inks?

In solvent-based systems like gravure or flexo, PY14 delivers strong color strength and a clean, reddish-yellow hue due to its high purity. However, it has limited solvent resistance; prolonged exposure to aggressive solvents (e.g., MEK, ethyl acetate) can cause bleeding or darkening. For offset inks, the pigment’s low oil absorption and excellent transparency make it ideal for process yellow and overprint varnishes. Its heat stability (good up to 200°C) suits heatset offset, but it lacks the rub resistance needed for harsh solvent environments. Always test in your specific solvent blend. HP Yellow 1543 takeaway: Choose it for standard offset or mild solvent applications, not for harsh solvent exposure.

What are the specific performance limits of HP Yellow 1543 in high-speed printing or heavy coverage?

At high press speeds (above 12,000 sheets/hour in offset), PY14 can show a slight increase in misting if not optimally dispersed due to its small particle size. In heavy coverage areas, its moderate lightfastness (rating 4-5 on the blue wool scale) means fading will occur over weeks in direct sunlight—unlike weather-resistant alternatives like PY83. The pigment’s pH range (neutral to slightly acidic) makes it incompatible with highly alkaline fountain solutions, risking toning. Maximum achievable concentration in offset is around 20-22% without viscosity spikes. HP Yellow 1543 takeaway: It is not a high-durability workhorse; reserve it for indoor, short-run, or cost-sensitive jobs.

How does PY14 compare to HP Yellow 1543’s sibling grades, such as PY13 or PY83?

PY14 is chemically distinct from PY13 (a greenish diarylide) and PY83 (a high-performance yellow). PY14 offers a much redder shade (CI 21095) than PY13’s green-yellow, but both have similar solvent bleed tendencies. PY83 has 3-4x better lightfastness and excellent heat stability (to 260°C), making it suitable for outdoor applications—but it costs 50-70% more. HP Yellow 1543 provides a cost-effective balance: stronger color strength than PY83 in tin tones, but inferior durability. It lacks the migration resistance of PY83 for food packaging. HP Yellow 1543 takeaway: Use it for economic red-shade yellows where outdoor durability is not critical; upgrade to PY83 for premium or long-lasting applications.

What specific dispersion process is needed for HP Yellow 1543 to avoid streaking or grit in offset inks?

PY14’s particle morphology requires a three-roll mill or bead mill with high shear. Start with a pre-dispersion using a hydrophobic wetting agent (e.g., 2% hyperdispersant based on pigment weight) to prevent agglomeration. Optimal mill base viscosity should be around 10-15 Pa·s at 50°C; higher viscosity causes over-shearing and recrystallization. Target a particle fineness below 5 microns (Hegman gauge 7+). Avoid over-grinding beyond 30 minutes, which broadens the particle size distribution and reduces gloss. In solvent inks, use slow-evaporating solvents like cyclohexanone to maintain wetness. HP Yellow 1543 takeaway: Precision shear control is mandatory—under-dispersion gives streaking, over-dispersion kills gloss.

What are the critical storage conditions and substitution risks for HP Yellow 1543?

Store in a cool, dry place below 30°C; humidity above 65% can cause caking due to the pigment’s polar surface. Shelf life is 24 months in unopened drums—beyond that, color shift toward green may occur. Never substitute PY14 directly for PY13 or PY1 in a recipe without recalibration; the shade difference (ΔE > 3) can be obvious in a 1:20 tint. If replacing with HP Yellow 1543 for an older batch, verify the resin’s acid value—low-acid resins cause flocculation. For migration-sensitive end uses (e.g., toys), PY14 is not compliant with EN71-3. HP Yellow 1543 takeaway: It is stable predictable only if stored dry and never swapped without full shade-matching and resin compatibility tests.

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