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CR Minerals pumice products are 100% natural materials. No synthetic chemicals or other materials are added during mining or processing. The superior properties of CR Minerals pumice products result from both our unique high purity, low-density pumice deposit and our exacting process procedures.

PFM

PFM

(Pumice Filtration Media)®

Technical Data

Typical Chemical Analysis

Weight %

Silicon Dioxide

SiO2

75

Aluminum Oxide

Al2O3

12

Potassium Oxide

K2O

4

Sodium Oxide

Na2O

4

Calcium Oxide

CaO

<2

Magnesium Oxide

MgO

<2

Titanium Oxide

TiO2

<2

Ferrous Oxide

Fe2O3

<2

Physical Properties - Navajo Brand®

Specific Gravity

2.4

Weight per Solid Gallon, Lbs.

20.0

Bulking Volume, Gal/Lb.

0.5

Hardness (Mohs Scale)

6.0

pH (10% in Water)

9.0

Refractive Index

1.5

Refectance (Green Filter)

80

Moisture Content

<1%

Reactivity

Inert

Color

Off-White

Typical Physical Properties - SafSil®

CT 200

CT 450

CT 550

Median Particle Size (Microns)

12

7

5

Hegman Grind

2

4.5

5.5

Oil Absorption (ASTM D281)

25

26

28

GE Brightness

77

78

80

Specific Gravity

2.34

2.34

2.34

Weight / Gallon

19.5

19.5

19.5

Hardness, Mohs Scale

5.5 - 6.0

5.5 - 6.0

5.5 - 6.0

Refractive Index

1.5

1.5

1.5

pH (10% in Water)

9

9

9

Moisture Content

<1%

<1%

<1%

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