KAOLIN INFORMATION
Kaolin, also known as china clay, has a great number of uses. These include: ceramics, filler, pharmaceutical, absorbent, and many others.

Grades of KAOLIN
KAOLIN CALCINED CLAY INFORMATION
This is a white clay which has been subjected to very high temperatures. This thermal treatment is strong enough to rearrange the crystal structure, creating a new product not seen in nature.
CHEMICAL SPECIFICATIONS: | |
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SiO2 | 57. % |
Al2O3 | 40. % |
K2O | 1.2 % |
Fe2O2 | 0.93% |
TiO2 | 0.54% |
PHYSICAL SPECIFICATIONS: | |
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L.O.I | 0.23% |
Color | White |
Brightness | 90-93 GE TAPPI T-6460575 |
Oil Absorption | 69-79 ASTM |
Oil Absorption | 71-81 Gardener Coleman |
Moisture | 0.4% max |
pH | 5.3-6.3 |
Refractive Index | 1.62 |
Bulk Density | 18.8 lbs/cu. ft loose |
Bulk Density | 29.4 lbs/cu. ft packed |
Top Particle Size | 25 micron |
Average Particle Size | 2 micron |
10% Finer Than | 0.5 micron |
KAOLIN ELECTROS INFORMATION
An exceptionally fine, bulky kaolin, passing pharmaceutical specifications. This reversible colloid can be used internally; is free from mica, feldspar, iron, and alkali; and is recommended for use in the pharmaceutical and cosmetic industries.
CHEMICAL ANALYSIS: | |
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SiO2 | 47.7% |
Al2O3 | 37.6% |
K2O | 0.99% |
Fe2O3 | 0.57% |
MgO | 0.16% |
Na2O | 0.15% |
Pb | 10 ppm |
As | 2 ppm |
Acid solubles | < 1% |
LOI | 12.8% |
PHYSICAL ANALYSIS: | |
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Specific gravity | 2.6 |
Apparent density | 0.57 g / cc |
Bulk | 25 lbs. ft3 |
Whiteness | 89 |
Size | |
Through 325 mesh | 99.5% |
Over 10 microns | 0.5% |
Under 2 microns | 75.0% |
pH | 7.5 |
Oil absorption | 45 |
KAOLIN LION INFORMATION
A washed, white, soft Kaolin with very low levels of trace elements including low heavy metals.
CHEMICAL ANALYSIS: | |
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Silica (SiO2) | 47.0% |
Alumina (Al2O3) | 37.0% |
Loss on Ignition | 12.1% |
Ph | 5.0 |
PHYSICAL ANALYSIS: | |
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Brightness | 82.5 |
Yellowness | 5.2 |
Particle Size Distribution: | |
Over 50 Microns | 0.05% max |
Over 10 Microns | 15% max |
Under 2 Microns | 45% max |
Oil Absorption | 38g / 100cc |
Specific Gravity | 2.6 |
KAOLIN PLUS WHITE INFORMATION
This is a white, natural, hydrated Kaolin. It provides good hiding and other
valuable properties to many other industries at a reasonable cost.
CHEMICAL ANALYSIS: | |
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SiO2 | 44.5% |
Al2O3 | 39.5% |
TiO2 | 1.5% |
Fe2O2 | 1.0% |
CaO | 0.25% |
Moisture | 0 to 2% |
LOI | 14.0% |
PHYSICAL ANALYSIS: | |
---|---|
Brightness | 82 to 84% |
Specific Gravity | 2.58% |
pH | 6.0% |
Refractive Index | 1.57% |
Thru 325 Mesh | 99.5% |
Thru 2 Micron | 83.0% |
Average Particle | 0.8 Micron |
Loose Density | 25. lb/cu. ft |
Packed Density | 45. lb/cu. ft |
KAOLIN SLURRY INFORMATION
An aluminum silicate composed of Eastern Kaolin and sold as a 70% solids slurry in rail tanks or truck tanks.
CHEMICAL ANALYSIS: | |
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SiO2 | 45.5 % |
Al2O3 | 38.5 % |
Fe2O2 | 0.27 % |
MgO | 0.02 % |
CaO | 0.02 % |
Na2O | 0.03 % |
K2O | 0.13 % |
TiO2 | 1.74 % |
LOI | 13.5 % |
SO4 trace | 100 ppm max |
PHYSICAL ANALYSIS: | |
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Appearance | white or milky liquid |
Residue | 2.0% max 325 mesh wet screen |
Brightness | 72 -78 GE |
L* | 93.87 |
a* | 0.94 |
b* | 8.67 |
D90 | 12. micron |
D50 | 1.8 micron |
D20 | 0.5 micron |