Pigment Black 11/ IRON OXIDE BLACK 330
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Technical Information
What Is PBk11 / IRON OXIDE BLACK 330
CAS 1317-61-9, CI 77499, Type: Iron Oxide (Fe3O4). PBk11 / IRON OXIDE BLACK 330 is a synthetic black iron oxide pigment with a magnetite crystal structure, offering the highest tinting strength among all iron oxide pigments. It possesses intrinsic magnetic properties, excellent lightfastness, and strong chemical resistance. Produced via the Laux or precipitation processes, this grade is optimized for use in construction materials, coatings, plastics, toners, and magnetic recording media.
Why Choose IRON OXIDE BLACK 330
This specific grade is engineered for demanding applications in coatings and plastics where maximum color strength and consistency are critical. It delivers deep, neutral black tones with superior dispersion, enabling efficient formulation at lower loading levels. Unlike iron oxide blacks with broader particle size distributions, grade 330 ensures uniform opacity and gloss retention in solvent- and water-borne coatings. In plastics, it withstands high processing temperatures without degradation, maintaining jetness in masterbatches and molded parts. It outperforms standard iron oxide blacks in tinting efficiency and provides better UV stability than many organic black pigments. With no direct sibling grades, it serves as a standalone high-performance solution for manufacturers seeking reliable, cost-effective black pigmentation.
Key Features
- Boosts superior tinting strength for reduced pigment consumption while maintaining intense black coloration.
- Demonstrates excellent thermal stability up to 300°C, suitable for high-temperature plastic processing.
- Offers outstanding lightfastness and weatherability, ensuring long-term color retention in outdoor coatings.
- Delivers consistent magnetic properties for use in toner and magnetic recording media applications.
- Resists chemical attack from acids, alkalis, and solvents, enhancing durability in harsh environments.
C.I.NO.: PBk11
Advantage:
Main Application Recommended: Coatings, Plastics
Product Description – PBk11
IRON OXIDE BLACK 330 (Pigment Black 11) is a inorganic pigment with strong tinting strength, excellent hiding power, and great color/UV/heat/water resistance for long-lasting use. It also has good dispersibility, is non-toxic and eco-friendly, ideal for paints, plastics and construction materials.
Recommended Application
wall bricks, cements, paving bricks, paintings, coatings, plastics, rubber and so on
Technical Data
| Product Information | ||||
| Chemical Type | CAS NO. | 1317-61-9 | ||
| C. I. Name | Pigment Black 11 | EINECS / ELINCS NO. | 215-227-5 | |
| C. I. Constitution No. | 77499 | Chemical Formula | ||
| Technical Performance | ||||
| Full Shade | Tint | |||
| Weather Resistance | 5 | 5 | ||
| Light Fastness | 8 | 8 | ||
| Physical Properties | ||||
| Physical Form | Powder | Moisture： | ≤1.5% | |
| Content（Fe3O4）： | ≥90.0% | PH Value: | 5-8 | |
| Oil Absorption: | 15-25 ml/100g | Density： | 0.8-1.2g/cm3 | |
| Residue on Sieve(90 sieve)： | ≤0.5% | particle shape： | Spherical | |
| Water soluble content： | ≤0.5% | Color strength: | 95%~105% | |
| Chromatic aberration △E: | ≤1.0 | |||
| Packaging | ||||
| 25kgs/bag 1000kgs/Pallet | ||||
| Storage | Shelf Life | 5 years | ||
| Should be stored in cool, dry and ventilate place. | ||||
| TRANSPORTATION | ||||
| Avoid inversion, sunlight, moisture and crash. Avoid damage the package. | ||||
- 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.
Why Choose Honor Pigments?
- 🌍 Global Export Expertise — Trusted by customers in 40+ countries for consistent quality and reliable supply
- ✅ Strict Quality Control — ISO 9001 certified with batch-to-batch consistency and zero-defect policy
- 💰 OEM Production Advantage — Competitive pricing without compromising pigment performance
- 🧪 Technical Support — Free color matching, formulation advice and sample testing before bulk order
Frequently Asked Questions About PBk11 / IRON OXIDE BLACK 330
1. What makes PBk11 / IRON OXIDE BLACK 330 suitable for both coatings and plastics applications?
PBk11 (Iron Oxide Black 330) is a high-purity synthetic pigment with a fine particle size and high tinting strength, making it ideal for solvent-based, water-based, and powder coatings as well as engineering plastics. Its chemical stability ensures excellent dispersion in common resin systems like epoxy, polyurethane, and polyolefins. The pigment provides consistent jet-black coloration without the conductivity or high oil absorption of carbon blacks, allowing formulators to achieve deep, opaque finishes with minimal loading. In plastics, it resists migration and maintains color integrity during high-temperature processing (up to 300°C), making it a versatile choice for automotive trim, industrial paints, and consumer goods.
2. Are there performance limits—such as UV stability or heat resistance—that I should know?
While Iron Oxide Black 330 offers excellent opacity and chemical resistance, its UV durability is moderate compared to carbon blacks; prolonged outdoor exposure can lead to slight graying or color shift, especially in high-sunlight areas. For exterior coatings, a UV-stabilized topcoat or blending with a small percentage of carbon black is recommended. Heat resistance is robust up to ~300°C, but prolonged exposure above 350°C may cause oxidation to reddish iron oxides. It is not recommended for applications above 500°C or in strongly reducing atmospheres. The pigment also has lower electrical conductivity than conductive carbon blacks, which is beneficial for insulative coatings but limits use in antistatic formulations.
3. How does PBk11 compare to carbon black (e.g., PBk7) for black coloring?
The key difference is chemistry: PBk11 is an iron oxide (Fe₃O₄) whereas carbon black is nearly pure elemental carbon. Iron Oxide Black 330 produces a warmer, slightly less intense black with a lower tinting strength—requiring about 2–3 times more pigment to match the jetness of a fine carbon black. However, PBk11 offers superior chemical resistance to solvents and acids, non-conductivity, and lower toxicity, making it preferred for food-contact plastics and medical devices. It also has significantly lower oil absorption, which eases dispersion in high-load coatings. Cost-wise, iron oxide black is generally less expensive per pound but may need higher loading for full opacity.
4. What processing challenges might I encounter when incorporating PBk11 into plastics or coatings?
The main challenge is achieving full dispersion due to the pigment’s relatively high density (4.95 g/cm³) and crystalline structure. In plastics, incomplete dispersion can cause streaking or reduced impact strength; using a masterbatch or twin-screw extrusion with high shear is recommended. For coatings, agglomeration may occur if the pigment is added directly without pre-wetting or grinding in a bead mill for 20–30 minutes at 3000 rpm. A dispersant (e.g., polyacrylate or modified polyurethane) helps stabilize the particles, especially in waterborne systems. pH sensitivity is another factor: in acidic environments (pH < 5), iron oxide can slowly dissolve, so avoid acid-catalyzed systems.
5. What is the shelf life of PBk11, and can I substitute it with other black pigments in a formula?
Iron Oxide Black 330 has a shelf life of 5 years when stored in a cool, dry environment (below 40°C, <60% humidity) in sealed, airtight containers. Exposure to moisture can cause clumping or oxidation to brown iron oxides. Common substitutes include Copper Chromite Black (PBk28) for higher heat tolerance, or Magnetite (natural Fe₃O₄) for a lower-budget option with reduced tint strength. However, PBk11 is unique for its combination of mid-range heat stability, non-conductivity, and chemical inertness. Substitution often requires recalculating loading, adjusting dispersant levels, and verifying color saturations through a small-batch trial.
Takeaway: IRON OXIDE BLACK 330 (PBk11) is a reliable, cost-effective, non-conductive black pigment optimized for stable color in coatings and plastics—ideal where moderate heat resistance, chemical robustness, and safe handling outweigh the need for absolute jetness.
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