Blue 385
CI Pigment Blue 28
Cobalt Aluminate Blue Spinel

A rich blue powder produced by high temperature calcination. This pigment has fair 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 is generally used in applications where resistance to heat, light, and weather are needed. It is compatible with most resin systems and polymers, and is non-warping.

Specifications:


Specific Gravity

4.2

Oil Absorption

30 kg/100 kg

Residue 325 mesh [44 µm]

0.01 wt%

pH

9.7

Heat Stability

800 °C

Surface Area BET

15 m²/g

Conductivity

375 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

0.42 kg/L

Mean Particle Size

1.0 µm

HBU

37 °C

TSR

28 %

Reflectance (300-2500nm)

Reflectance (visible only)