PIGMENT YELLOW 83/ HP YELLOW 1680

What Is PY83 / HP YELLOW 1680

CAS 5567-15-7, CI 21108, a Disazo Diarylide yellow. This high molecular weight pigment offers significantly better solvent resistance than PY12/13/14, making it the dominant choice for packaging gravure and offset inks where solvent fastness is critical. Its reddish-yellow shade and very high tinctorial strength allow formulators to achieve strong, transparent color in nitrocellulose-based inks. Specifically, the HP YELLOW 1680 grade targets coatings applications, delivering a semi-opaque finish with enhanced lightfastness for durable surface protection.

Why Choose HP YELLOW 1680

HP YELLOW 1680 is engineered for coatings that demand superior lightfastness (5-6 Blue Wool) and heat stability up to 200°C, outperforming standard diarylide yellows in outdoor or high-temperature environments. Unlike its sibling PY83 grades—HP YELLOW 1576 (optimized for gloss and low viscosity in inks) and HP YELLOW 1688 (opaque HR70 grade)—this variant offers a semi-opaque appearance with excellent lightfastness, ideal for industrial and architectural coatings where both hiding power and UV resistance matter. Choose HP YELLOW 1680 when your application requires a balance of solvent resistance, thermal stability, and long-term color retention in pigmented systems like coil coatings, traffic paints, or exterior finishes.

Key Features

• High molecular weight disazo diarylide structure provides exceptional solvent resistance, preventing color bleeding in solvent-based coatings.
• Good lightfastness rating of 5-6 on the Blue Wool scale ensures minimal fading in exterior or UV-exposed coatings.
• Heat stability up to 200°C allows incorporation into high-temperature baking enamels and powder coatings without degradation.
• Very high tinctorial strength delivers intense color at low loading levels, reducing raw material costs in coating formulations.
• Semi-opaque character balances transparency and hiding power, enabling design flexibility for basecoats, primers, and topcoats in protective coatings.

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C.I.NO.: PY83

Advantage: Semi-Opaque, Light fastness

Main Application Recommended: Coatings

Product Description -PY83

HP YELLOW 13129 (PIGMENT YELLOW 83) is a bright reddish-yellow azo pigment. It exhibits excellent lightfastness, heat resistance, and solvent fastness, and is semi-opaque. It is used to a considerable extent in most segments of the paints and coatings industry.

Recommended Application：

Coatings: solvent based coatings, water based coatings, industrial coatings, powder coatings, coil coatings, wood 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

Why is PY83 recommended specifically for coatings rather than plastics or inks?

PY83, also known as HP Yellow 1680, features a chemical structure (CAS 5567-15-7, CI 21108) that excels in coatings due to its high transparency and strong chromatic strength, which are critical for achieving brilliant metallic and effect finishes. In plastics, its heat stability (approx. 200°C) is insufficient for high-temperature molding processes, and in inks, its rheology doesn’t match high-speed printing requirements. For coatings, however, it offers excellent solvent resistance and lightfastness (7-8 on the blue wool scale), making it ideal for automotive and industrial topcoats. HP Yellow 1680 provides the optimum balance of color purity and durability for demanding coating systems.

Are there any performance limits when using PY83 in exterior or high-solids formulations?

While PY83 offers good lightfastness, it has limited weatherfastness compared to more robust pigments like PY110 or PY138, especially in high-solids or low-bake coatings where film integrity may be lower. Its main limitation is a tendency to fade upon prolonged UV exposure in pastel shades or thin films. Additionally, it shows moderate resistance to strong acids and bases, which can be a factor in industrial maintenance coatings. For optimal results, use HP Yellow 1680 in full-shade or mid-tone formulations with UV stabilizers. Never rely on it for 10-year outdoor exposure. HP Yellow 1680 is best suited for controlled indoor or automotive refinish applications, not continuous exterior architectural use.

How does HP Yellow 1680 compare to other PY83 grades, like the more opaque versions?

Standard PY83 is semi-opaque, but HP Yellow 1680 is specifically engineered for high transparency and lower surface area, which minimizes oil absorption (approx. 40 g/100g). This makes it superior for solvent-borne basecoats where a clean, bright undertone is needed for metallic effects. Opaque PY83 grades, by contrast, contain larger primary particles, yielding higher hiding power but duller, greener shades. HP Yellow 1680 also demonstrates better chemical purity, reducing gassing in high-solids urethane systems. For gloss retention and flow, HP Yellow 1680 outperforms standard high-hiding versions. HP Yellow 1680 takeaway: if your goal is vivid, transparent yellows, this grade is unrivaled; but for high-hiding solid colors, choose a different PY83 form.

What are the critical processing tips for dispersing HP Yellow 1680 in coatings?

HP Yellow 1680 is a soft, organic pigment that requires careful dispersion to avoid over-grinding, which can generate fines and lower gloss. Use a bead mill with 1.0-1.5 mm zirconia beads at moderate tip speed, and never exceed 60°C during milling. Pre-wetting the pigment in a compatible solvent reduces dust and improves wetting. Because of its high oil absorption, the resin-to-pigment ratio must be optimized to avoid shock. Over-thinning before dispersion leads to poor color development. Properly dispersed, it yields a bright, clean undertone. HP Yellow 1680 takeaway: control your grind energy and temperature; this pigment rewards low-shear, controlled dispersion with brilliant color development.

How should PY83 be stored, and can it substitute for other yellows like PY150 or PY154?

Store HP Yellow 1680 in a cool, dry environment (below 30°C) with low humidity, as the pigment can absorb moisture, leading to agglomeration or poor dispersion. Shelf life is typically 24 months from the production date if unopened. Regarding substitution, HP Yellow 1680 has a greener, more transparent shade than PY150 (yellow-gold) and is less red than PY154. It can partially replace PY154 in non-lead systems for similar hue, but not for heat or chemical resistance. HP Yellow 1680 cannot replace PY150 in high-UV applications due to lower weatherfastness. HP Yellow 1680 takeaway: it is a poor direct substitute for those pigments; use it where its specific transparent green-shade yellow is required, not as a universal replacement.

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