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Barbados Cobalt Blue
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Cobalt blue is a blue powder with a greenish hue. It is mainly composed of cobalt aluminate Co(AlO2)2. It is obtained by mixing cobalt phosphate with aluminum hydroxide or aluminum oxide and then calcining. It is heat-resistant, light-resistant, acid-resistant, and alkali-resistant. It is used in the production of glass and ceramics, as well as in drawing and painting.
It has excellent hiding power, strong coloring ability, and dispersibility; outstanding outdoor light resistance, weather resistance, and high-temperature resistance; good resistance to acids, alkalis, various solvents, and chemical corrosion; it is non-permeable and non-migratory; it has good compatibility with most thermoplastic and thermosetting plastics; it also has infrared-reflective properties and is widely used in rolled steel coatings, engineering plastics, anti-counterfeiting coatings, and roof insulation coatings.
Chinese alias: C.I. Pigment Blue 28; Cobalt Blue; Cobalt Green.
C.I. structure number: 77346.
CAS number: 1345-16-0.
EINECS: 310-193-6.
Crystal form: Spinel pattern.
Chemical properties: acid and alkali resistant, high temperature resistant, weather resistant, and chemically inert.
【Cobalt Blue Technical Parameters】
| Refers to Standard Name Designation |
Refers to Standard Reference Number |
| Relative density (g/cm3) |
3.8~4.54 |
| Sieve residue (325 mesh) (%) |
≤0.1 |
| Hiding power (g/m2) |
75~80 |
| Color (compared to standard sample) ΔE |
≤3 |
| Oil absorption (g/100g) |
31-37 |
| Apparent specific volume / (g/L) |
630~740 |
【Product Applications】
(1) Cobalt blue has a bright color, excellent weather resistance, and alkali resistance, and can withstand various solvents, with heat resistance up to 1200℃.
(2) Cobalt blue is an environmentally friendly, non-toxic, high-temperature resistant inorganic pigment.
(3) Cobalt blue is mainly used in high-temperature coatings, ceramics, enamel, and glass coloring.
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