PIGMENT YELLOW 13/ HP YELLOW 1534

What Is PY13 / HP YELLOW 1534

CAS 5102-83-0, CI 21100, Type Disazo Diarylide. This specific grade is a high-transparency, strong-color disazo diarylide yellow, slightly redder than PY12, engineered primarily for solvent-based inks and offset printing. Its improved transparency over PY12 makes it the preferred choice for multi-color process printing where clean overprints and high color strength are critical. With lightfastness rated 4-5, it delivers reliable performance in commercial and packaging applications requiring vibrant, stable yellows.

Why Choose HP YELLOW 1534

Choose HP YELLOW 1534 when your application demands exceptional gloss and high transparency in solvent-based and offset ink systems. Unlike its sibling HP YELLOW 1342, this grade is specifically optimized for maximum translucency and brilliance, making it ideal for process color sequences where trap and overprint clarity are paramount. The grade’s high color strength allows for lower pigment loadings, improving ink flow and reducing costs without sacrificing vibrancy. For solvent-based flexo or gravure inks, its solubility and dispersion characteristics ensure smooth press performance and deep, glossy finishes. In offset, its transparency enables clean secondary hues when layered with cyan and magenta, outperforming standard PY12 for four-color work. Select HP YELLOW 1534 whenever your print job requires a redder yellow with superior transparency and gloss that HP YELLOW 1342 cannot match.

Key Features

• High transparency enables precise multi-color process printing by improving trap efficiency and overprint cleanliness in offset and solvent-based inks.
• Exceptional gloss development enhances visual appeal and surface finish in solvent-based ink formulations, critical for high-end packaging.
• Strong color strength reduces required pigment dosage, lowering raw material costs while maintaining vibrant, saturated yellow tones.
• Slightly redder shade than PY12 allows for warmer process yellows and broader color gamut in four-color printing applications.
• Lightfastness rating of 4-5 ensures durable print performance suitable for indoor commercial and packaging exposures without significant fading.

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C.I.NO.: PY13

Advantage:  Good gloss, High transparency

Main Application Recommended: Solvent based inks, offset inks

Product Description – PY13

HP YELLOW 1534 (PIGMENT YELLOW 13) is a vibrant mid-shade diarylide yellow pigment. This cost-effective pigment offers excellent transparency and high gloss, making it a preferred choice for high-volume use in packaging gravure inks, where it delivers vivid, consistent color and superior print quality.

Recommended Application：

Coatings: industrial paints
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 PY13

How does HP YELLOW 1534 specifically fit solvent-based and offset ink formulations?

For solvent-based inks, HP YELLOW 1534 offers robust solubility in common aliphatic and aromatic solvents like toluene and xylene, providing clean, transparent yellow shades without flocculation. In offset inks, its high pigment load (compared to generic PY13) ensures strong tinctorial strength even at low dosage, reducing mill-base waste. The particle size is engineered for rapid wetting, so it integrates seamlessly into sheet-fed or web-offset vehicles without causing plate blinding. Unlike some diarylide yellows, this grade resists blooming in solvent systems. **HP YELLOW 1534 takeaway:** You get a dual-purpose pigment that avoids re-formulation pitfalls between solvent and offset lines.

What are the specific performance limits of HP YELLOW 1534 regarding heat and chemical resistance?

HP YELLOW 1534 exhibits lightfastness up to 5-6 on the Blue Wool scale, suitable for indoor offset prints but not for long-term outdoor solvent ink exposure. Heat stability peaks around 160°C (320°F) for short durations; prolonged exposure above 180°C triggers color shift due to diarylide structure degradation. In solvent inks, it withstands mild acid/base exposure (pH 4-9) but bleeds in aggressive ketones or esters like MEK. Offset users should note it will react with highly alkaline fountain solutions. It is not recommended for baking enamels. **HP YELLOW 1534 takeaway:** Excellent for standard commercial print runs, but avoid high-heat curing or alkaline environments.

How does HP YELLOW 1534 compare to PY13 grades from other suppliers or to PY14 siblings?

Generic PY13 often suffers from batch-to-batch shade drift (greenish vs. reddish yellow) and lower dispersion stability. HP YELLOW 1534 is tightly controlled to a CI 21100 reddish-yellow hue (L* ~88, a* ~-5, b* ~90), ensuring repeatability across drums. Compared to sibling PY14, PY13 offers slightly higher opacity and better bleed resistance in solvent systems, making it preferable for opaque packaging inks. PY14 yields greener shades but weaker tinctorial strength. HP YELLOW 1534 also outperforms budget PY13 variants in rheology; it does not thicken during solvent ink storage. **HP YELLOW 1534 takeaway:** Reduces QA headaches and provides consistent color even after extended shelf life in mixed inks.

What are the critical processing/dispersion parameters for HP YELLOW 1534 in mills and bead mills?

Pre-wetting the pigment at 60-70°C in resin/solvent premix reduces agglomerates. Use a high-shear dissolver at 2500-3000 rpm for 10 minutes before bead milling. For offset inks, triple-roll mill passes at 40-50°C yield optimal transparency and color strength without overgrinding, which can cause shade dullness. In solvent bead mills, use 0.5-1.2 mm zirconium beads; monitor slurry temperature below 60°C to prevent crystal growth. Avoid over-dispersion beyond 20-30 minutes, as PY13 can revert to a duller phase. Viscosity spikes if dispersant type (e.g., BYK-163) is mismatched; test with 2% on pigment. **HP YELLOW 1534 takeaway:** Controlled low-temperature milling preserves its clean, bright hue and fine particle distribution.

What storage conditions are required for HP YELLOW 1534, and can it directly substitute other PY13 grades?

Store sealed at 15-30°C in dry conditions; moisture absorption above 2% can cause caking and reduce dispersion speed. Never store near acidic fumes, as diarylide yellows can form toxic benzidine derivatives under extreme conditions. For substitution: HP YELLOW 1534 directly replaces standard PY13 in most offset and solvent bases without rheology adjustments, but always test shade (it runs slightly redder than older CI 21100 batches). It cannot replace PY83 or PY12 due to hue and fastness differences. For existing inks, conduct a strength titration at 10% step increments. **HP YELLOW 1534 takeaway:** A drop-in upgrade with better dispersion stability and tighter color specs than legacy PY13 stocks.

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