Cobalt Aluminate Blue Spinel Pigment Blue 28 P.B. 28 For Glass printing ink

Cobalt Aluminate Blue Spinel FU-GS594 C.I. Pigment Blue 28 (77346) is an complex inorganic color pigment cobalt blue P.B. 28 that suitable for glass. It's a more bright color than FU-GS584 cobalt blue.

 

 

Pigment Blue 28 (PB28, C.I. 77346), chemically known as Cobalt Aluminate Blue Spinel (CoAl₂O₄), is a high-performance Complex Inorganic Colored Pigment (CICP). As a classic inorganic blue pigment, PB28 is renowned for its unique spinel structure and exceptional stability, making it ideal for applications requiring superior heat resistance, weatherability, and chemical resistance.

Alternative Names: Thenard's Blue, Cobalt Ultramarine, King Blue.

Cobalt Aluminate Blue Spinel, also known as cerulean pigment, is a blue pigment with a green tone. It's Heat resistance, light resistance, acid resistance, alkali resistance. It is used for glass and ceramics, as well as for drawing and coating. It's prepared by calcination of cobalt oxide, cobalt phosphate and aluminum hydroxide or aluminum oxide.

 

 

Mass Tone	Item NO.	C.I.	C.I. NO.	Item Name	Composition	CAS NO.	Technical Indication
							Heat Stability	Oil Absorption g/100g	Moisture %	Average Particle Size(D50) (µm)≤	325 Mesh Sieve Residue
	FU-GS594	P.B.28	77346	Cobalt Aluminate Blue Spinel	Co-Al	1345-16-0	1000℃	20-35	≤0.3	1.5	≤0.05

 

Cobalt Aluminate Blue Spinel Pigment Blue 28, also known as cobalt blue, is one of the most popular colors used in glass printing. This vibrant and rich blue pigment offers a range of benefits, making it an excellent choice for glass printing applications.

 

Key Advantages

Feature	Description
Exceptional Heat Resistance	Withstands temperatures above 1000°C, ideal for ceramic glazes, enamels, and high-temperature coatings
Superior Lightfastness	Grade 8 lightfastness (ISO 105-B02), remains vibrant outdoors without fading
Excellent Chemical Stability	Resistant to acids, alkalis, and oxidation, suitable for harsh chemical environments
Outstanding Hiding Power	High tinting strength, achieving ideal color depth at low dosage
Eco-Friendly & Safe	Inorganic mineral pigment, compliant with REACH / FDA standards

 

 

 

Exceptional Thermal Stability: It withstands the high firing temperatures of glass (often above 600°C) without decomposing or changing color.

Superior Chemical Durability: Highly resistant to acids, alkalis, and environmental weathering, ensuring long-lasting color on the glass surface.

 

PB 28 is high color strength. It produces a deep, intense blue hue that is unmatched by other pigments. This makes it an excellent choice for creating eye-catching designs and patterns on glass surfaces.

 

 

Brilliant and Stable Color: Produces a clean, vivid, and intense blue hue that remains consistent and unchanged through the firing process.

Excellent Compatibility: Disperses well in glass frit and ink vehicle systems, enabling smooth application and reliable performance.

 

 

Non-Reactive: As a calcined spinel pigment, it is inert and does not interact adversely with the glass matrix or other ink components, preventing defects.

 

 

 

Typical Applications

Ceramics & Enamel Industry - Underglaze colors, colored glazes, sanitary ware, art ceramics

High-Temperature Coatings - Exhaust systems, ovens, industrial equipment heat-resistant coatings

Plastics & Polymers - Engineering plastics, masterbatch coloring (especially for high-temperature processing)

Glass Coloring - Bottle glass, architectural glass, art glass

Fine Art Paints & Inks - Oil paints, screen printing inks

Building Materials - Cement, concrete, roof tile coloring

 

Why Choose Our Pigment Blue 28?

"From raw material selection to finished product dispatch, every batch undergoes rigorous particle size distribution testing and color difference control, ensuring the highest consistency in every bag you receive."

✅ Stable Supply - Large-scale production, ample inventory, global logistics direct delivery
✅ Customization Service - Particle size distribution, surface treatment, and packaging specifications tailored to your needs
✅ Technical Support - Color matching consultation and application process guidance

 

Package and Delivery

 

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