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Our W series goes into high end SMC/BMC markets such as the automotive industry.

 

 

 

Specialty Grades

Huber's Optifil® and Hubercarb® W Series offer very high purity calcium carbonate.

Typical Chemical Analysis

Component

Percentage

Calcium Carbonate

99.3%

Magnesium Carbonate

.4%

Crystalline Silica

0.02%

Silica and Silicates

0.05%

Other

0.20%

Typical Physical Properties

 

Specialty Grades

Optifil JS

Optifil

Optifil T

W 3N

W3

W4

Surface Treatment

Treated

None

Treated

None

None

None

Median Particle Size (Microns, Sedigraph)

1.0

1.7

1.7

2.8

4.0

5.9

Dry Brightness (Hunter Reflectance)

94

93

92

92

92

92

Oil Absorption (lbs oil/100 lbs, ASTM D-281)

18

17

16

15

15

13

Moisture (%, ASTM D-280)

0.25

0.20

0.20

0.10

0.10

0.10

Loose Bulk Density (lbs/ft3, ASTM D-1895)

30

50

50

50

50

55

Compacted Bulk Density (lbs ft3, ASTM D-1895)

60

70

70

55

55

65

Weight Per Gallon (lbs/solid gallon)

22.6

22.6

22.6

22.6

22.6

22.6

325 Mesh Residue

0.05

0.005

0.005

0.005

0.005

1.0

Hegman Grind (ASTM D-1210)

5.5

6.5

6.5

6.0

6.0

2.0

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