Cobalt Zinc Aluminium Blue Spinel P.B.72 (77347)

 

 

 

FU-E525 Cobalt Zinc Aluminate Blue Spinel PB 72. Chemical formula: (Co,Zn)Al2O4. Deep blue, dark in masstone, but bright in tints. Cobalt Zinc Aluminate Blue Spinel (Co,Zn) Al2O4. PB72 is a cobalt-based blue pigment modified with zinc and aluminium in a stable spinel structure.

 

Key Advantages in Vitreous Enamel
Excellent Thermal Stability
Withstands typical enamel firing temperatures (750–850°C) without significant color shift or degradation, ensuring consistent blue coloration.

Bright & Clean Blue Hue
Provides a vibrant, slightly greenish blue tone that is brighter and cleaner than traditional cobalt aluminum blue (PB28), offering enhanced aesthetic flexibility.

High Chemical Resistance
Resistant to acids, alkalis, and environmental exposure, making it suitable for kitchenware, sanitaryware, and outdoor architectural panels.

Good Opacity & Tinting Strength
Offers strong covering power and color intensity, allowing efficient use in enamel formulations while maintaining a uniform, glossy finish.

Improved Cost-Effectiveness vs. Pure Cobalt Blues
Zinc and aluminum modification reduces cobalt content compared to some cobalt-rich blues, providing a more cost-effective blue option while maintaining good performance.
 

 

 

 

 

 

 

Typical Enamel Applications
Architectural enamel cladding & signage

Kitchen & cooking appliances (oven interiors, cookware)

Sanitaryware & decorative enamel items

High-temperature industrial coatings

 

 

 

 

Important Notes
Contains cobalt, but the spinel structure ensures good chemical inertness and low metal release when properly fired.

Color consistency depends on controlled firing conditions and compatibility with the enamel frit system.

 

 

 

 

Composition: Zn-Co-Al

CAS NO.: 68186-87-8

Heat Stability: 1200℃

Moisture: 0.3%

Sieve residue(325 mesh/45µm)≤0.1%

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