Last updated: 2026-01
Material Identity
- Chemical name: Copper chrome black pigment
- Material class: copper–chromium oxide spinel pigment
- Representative composition: Cu–Cr–O system (spinel structure; exact stoichiometry grade-dependent)
- CAS numbers: composition-dependent; commonly referenced under mixed metal oxide pigments
- Physical form: inorganic pigment powder
- What it is not: not carbon black, not an organic pigment, not a dye
Activation & Trigger Conditions
- Trigger: interaction with visible light
- Energy domain: electronic transitions within the metal–oxide spinel lattice
- Absent trigger: no coloration effect without light interaction
- Insufficient condition: poor dispersion reduces color depth and uniformity
- Excess condition: aggressive processing can damage surface integrity and affect appearance
Functional Role
- Provides stable black coloration
- Maintains color under high thermal exposure
- Resists chemical attack in demanding environments
- Supports long-term color durability in inorganic systems
Application Windows
- Compatible systems: engineering plastics, high-temperature coatings, ceramic bodies and glazes
- Loading range: formulation-dependent; no universal loading applies
- Processing notes: dispersion quality and particle distribution influence color strength and surface finish
Limitations & Failure Modes
- Poor dispersion → pigment agglomeration → uneven blackness or streaking
- Incompatible resin or matrix → flocculation → gloss reduction or color shift
- Over-milling or harsh shear → surface damage → reduced color consistency
Alternatives & Trade-offs
- Carbon black: stronger tinting but lower heat and weather stability
- Iron oxide black: good durability but different undertone and chroma
- Organic black pigments: higher jetness but limited thermal resistance
When to Use
- When high-temperature stability is required
- When inorganic pigment durability is preferred
- When carbon black is unsuitable due to processing or compliance needs
- When long-term color stability is critical
FAQ
Is copper chrome black the same as carbon black?
No. Copper chrome black is an inorganic oxide pigment with different optical, thermal, and dispersion behavior.
Does it withstand high processing temperatures?
Yes, as an inorganic spinel pigment it is generally suitable for high-temperature processing environments.
Why does blackness vary between formulations?
Variation is usually linked to dispersion quality, particle size distribution, and matrix compatibility.
Data
No numerical values are listed. Color strength, undertone, heat resistance, and chemical stability depend on grade and formulation and should be verified through COA and application testing.
Sources
Supplier technical documentation for copper chrome black pigments and general literature on inorganic spinel pigments.