PROFESSIONAL PIGMENT MANUFACTURER
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Brand
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Fineland Chem
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Color Index
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Pigment Blue 28 (Cobalt Blue)
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Color Index No
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77346
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CAS No
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1345-16-0
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EC No
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215-610-4
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Chemical Group
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Cobalt Blue
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| Chemical Formula | Co-AI-O |
Pigment Blue 28 (C.I. 77346), commonly known as Cobalt Blue, is an inorganic pigment composed primarily of cobalt aluminate spinel (CoAl₂O₄). It is known for producing a clean, bright blue shade and has been widely used in ceramics, coatings, plastics, and artistic materials.
Pigment Blue 28 belongs to the cobalt-based spinel pigment group, which is characterized by excellent thermal stability and chemical resistance. The spinel crystal structure contributes to the pigment’s durability under demanding processing conditions.
Due to its stable color performance at high temperatures and resistance to environmental exposure, Pigment Blue 28 is often selected for applications requiring durable blue coloration.
PB28 – ColorCor®1628 ⬇️TDS
Bright cobalt blue shade with outstanding thermal stability, excellent lightfastness and weather resistance, suitable for high-temperature plastics, coatings, and ceramic applications.
| Test Item | Specification |
| Density (g/cm3) | 4.2 |
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Water soluble matter (%)
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≤1.0
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Oil Absorption(g/100g)
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16-26
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PH Value
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7.5-9.5
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Mositure
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≤1.0
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Total impurities(ppm)
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≤600
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| Heat Resistance (℃) | ＜800 | Alkali Resistance (1-5) | 5 |
| Light Resistance (Full Shade, 1-8) | 8 | Migration Resistance(1-5) | 5 |
| Light (Reduced tinting, 1-8) | 8 | Ethyl Acetate (1-5) | 5 |
| Weather Resistance (1-5) | 5 | Ethanol (1-5) | 5 |
| Acid Resistance (1-5) | 5 | MEK (1-5) | 5 |
Pigment Blue 28 is used in several industrial coloration systems.
Typical applications include:
Ceramics and glass
Widely used in ceramic glazes, porcelain, and glass coloration due to its high thermal stability.
Industrial coatings
Applied in protective coatings, decorative paints, and specialty coatings.
Plastic coloration
Suitable for plastics requiring stable blue pigments during processing.
Artistic and specialty materials
Used in artist paints, industrial colorants, and specialty decorative applications.
The performance characteristics of Pigment Blue 28 are associated with its cobalt aluminate spinel structure.
Key properties include:
Color shade
Clean, bright blue tone.
Heat resistance
Excellent thermal stability, suitable for high-temperature processes.
Lightfastness
Generally provides very good resistance to light exposure.
Chemical resistance
Stable in many chemical environments.
Opacity
Typically provides moderate opacity in coatings and ceramics.
Pigment Blue 28—Cobalt Aluminate Blue Spinel, presents a deep and vivid blue. Its excellent color concentration and purity provide unparalleled blue effects for plastics, coatings, ceramics and inks, ensuring that every layer of color is stunning.
The dye has excellent lightfastness and will not fade even after long exposure to strong light. The lightfastness of Pigment Blue 28 makes it very suitable for applications that require long-term color stability, such as outdoor coatings and plastic products in high-light environments.
Pigment Blue 28 exhibits excellent chemical resistance and can resist corrosion from various acids, bases, solvents and high temperatures. Its chemical resistance ensures the durability and stability of coatings, ceramics and inks in various environments.
Whether it is plastics, coatings, ceramics or inks, Pigment Blue 28 can provide uniform and stable color effects. Its excellent dispersibility and compatibility make it suitable for a variety of materials and application scenarios, providing a wide range of possibilities for your product design.
Pigment Blue 28 complies with international environmental standards, does not contain harmful substances, and is safe and reliable. Its environmentally friendly characteristics not only ensure excellent color performance, but also support sustainable development, providing green and safe color solutions for your various applications.
Pigment Blue 28 may have certain limitations depending on application requirements.
Typical limitations include:
Higher cost compared with many organic blue pigments
Lower tinting strength than some phthalocyanine blue pigments
Shade variations may occur depending on formulation and particle size
When selecting Pigment Blue 28 for industrial formulations, several technical factors are typically considered:
Required color shade (clean cobalt blue)
Processing temperature, especially in ceramic or glass applications
Compatibility with coating or polymer systems
Opacity and color intensity requirements
Different commercial grades may vary in particle size distribution and application suitability.
| Pigment Blue 28 | Phthalocyanine Blue BN | Phthalo Blue BN | Monastral Blue G |
| Heliogen Blue LFB | Copper phthalocyanine | C.I. Pigment Blue 28 |
Pigment Blue 28 is produced by pigment manufacturers worldwide and is typically supplied as a powder pigment for industrial coloration applications such as ceramics, coatings, plastics, and specialty materials.
Commercial grades may differ depending on particle size distribution, purity, and processing characteristics designed for specific industrial uses.
● 25KG Kraft Bag, 1000kg Carton Box
● Lead Time: Normally around 15 days after signed contract.
1.What is another name for Pigment Blue 28?
Pigment Blue 28 is commonly known as Cobalt Blue.
2.What color shade does Pigment Blue 28 produce?
It typically produces a clean and bright blue shade.
3.Is Pigment Blue 28 suitable for high-temperature applications?
Yes. Due to its cobalt aluminate spinel structure, it offers excellent thermal stability, making it suitable for ceramics and glass coloration.
4.What is the difference between Pigment Blue 28 and Pigment Blue 15?
Pigment Blue 28 is an inorganic cobalt-based pigment, while Pigment Blue 15 pigments are organic phthalocyanine pigments with stronger tinting strength and different color characteristics.
