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Blue 3J
CI Pigment Blue 28
Cobalt Aluminate Blue Spinel

A dark blue powder produced by high temperature calcination. This pigment has good UV and visible opacity, is chemically inert, heat resistant, and stable to ultraviolet light. It is non-bleeding and non-migratory. It has exceptional durability and hiding power, and is generally used in applications where resistance to heat, light, and weather are needed. It is compatible with mostresin systems and polymers, and is non-warping. Typical applications (non inclusive) are liquid and powder coatings, inks, dispersions, concrete, plastics, and other applications where equivalent pigment chemistry is used.

Specifications:


Specific Gravity

4.2

Oil Absorption

34 kg/100 kg

Residue 325 mesh [44 µm]

0.01 wt%

pH

9.6

Heat Stability

800 °C

Surface Area BET

13.9 m²/g

Conductivity

369 µS/cm

Percent Moisture

0.6 wt%

Crystal Structure

spinel

Lightfastness

8 (1-8)

Weatherability

5 (1-5)

Acid Resistance

5 (1-5)

Alkali Resistance

5 (1-5)

Bulk Density

0.47 kg/L

Mean Particle Size

1.2 µm

HBU

37 °C

TSR

28 %

Reflectance (300-2500nm)

Reflectance (visible only)