PB28 Cobalt Blue is a high-performance inorganic blue pigment based on a cobalt aluminate spinel structure. It is engineered for applications requiring high thermal stability, chemical resistance, and long-term color durability, including plastics, industrial coatings, ceramics, glass, and ceramic ink systems.

Industry Challenges in High-Temperature and Ceramic Ink Applications

In high-temperature plastics, industrial coatings, and ceramic ink systems, pigment stability is a critical performance factor. Many conventional blue pigments suffer from thermal degradation, chemical instability, or color drift during processing or long-term service.

Why Conventional Blue Pigments Fail

Organic blue pigments typically degrade at processing temperatures above 250–300°C, limiting their use in engineering plastics and ceramic-related systems. Some inorganic alternatives lack sufficient chemical resistance or color stability under acidic, alkaline, or outdoor exposure conditions, leading to fading or surface defects.

PB28 Cobalt Blue Pigment as a Material-Level Solution

PB28 Cobalt Blue is based on a cobalt aluminate spinel crystal structure, which provides intrinsic thermal stability and chemical inertness. As an inorganic pigment, PB28 maintains consistent color performance under high-temperature processing and harsh chemical environments, making it suitable for demanding industrial and ceramic applications.

Key Performance Advantages

• Excellent thermal stability for processing temperatures above 300°C
• Strong resistance to acids, alkalis, and organic solvents
• Outstanding weather resistance for outdoor and architectural use
• Stable spinel crystal structure ensures long-term color consistency

PB28 for Ceramic Ink and Fine-Dispersion Systems

For ceramic ink and fine-coloration systems, PB28 Cobalt Blue can be supplied with controlled particle size distributions suitable for sub-micron dispersion. This enables stable ink formulation, reduced sedimentation risk, and smooth printing or coating performance without relying on nano-grade classification.

Typical Application Scenarios

• High-temperature industrial and architectural coatings
• Plastic masterbatch and engineering plastics requiring color stability
• PVC, UPVC, and outdoor polymer products exposed to UV and chemicals
• Ceramic inks, ceramic decoration, enamel, and glass coloration

When to Choose PB28 Cobalt Blue

PB28 Cobalt Blue is recommended when long-term color stability, chemical resistance, and high-temperature performance are required. It is particularly suitable for applications where organic pigments or low-grade inorganic blues fail to meet durability or processing demands.

Technical Support and Application Guidance

Our technical team provides formulation guidance, pigment selection support, and application-specific recommendations for plastics, coatings, and ceramic systems.