Air

1

Lucite

2.5

Amber

2.6 – 2.7

Mica (Electrical)

4.0 – 9.0

Asbestos Fibre

3.1 – 4.8

Mica (Clear India)

7.5

Bakelite (Asbestos base)

5.0 - 22

Mica (filled phenolic)

4.2 – 5.2

Barium Titanate

100 - 1250

Micaglass (titanium dioxide)

9.0 – 9.3

Beeswax

2.4 – 2.8

Micata

3.2 – 5.5

Cambric (varnished)

4

Mycalex

7.3 – 9.3

Carbon Tetrachloride

2.17

Neoprene

4.0 – 6.7

Celluloid

4

Nylon

3.4 – 22.4

Cellulose Acetate

2.9 – 4.5

Paper (Dry)

1.5 – 3.0

Durite

4.7 – 5.1

Paper (Coated)

2.5 – 4.0

Ebonite

2.7

Parafin (solid)

2.0 - 3.0

Epoxy Resin

3.4 – 3.7

Plexiglas

2.6 – 3.5

Ethyl Alcohol (absolute)

6.5 – 25

Polycarbonate

2.9 – 3.2

Fiber

5

Polyethylene

2.5

Formica

6

Polymide

3.4 – 3.5

Glass (electrical)

3.8 - 14.5

Polystyrene

2.4 – 3.0

Glass (photographic

7.5

Porcelain (dry process)

5.0 – 6.5

Glass (Pyrex)

4.6 – 5.0

Porcelain (wet process)

5.8 – 6.5

Gass (Window)

7.6

Quartz

5

Gutta Percha

2.4 – 2.6

Quartz (fused)

3.78

Isolantite

6.1

Rubber (Hard)

2.0 – 4.0

Selenium (amorphous)

6

Ruby Mica

5.4

Styrofoam

1.03

Styrofoam

1.03

Teflon

2.1

Vinylite

2.7 - 7.5

Silicone (glass) (molding)

3.2 - 4.7

Soil (dry)

2.4 - 2.9

Titanium Dioxide

100

Water (distilled)

34 - 78

Silicone (glass) (laminate)

3.7 - 4.3

Steatite (ceramic)

5.2 - 6.3

Vaseline

2.16

Waxes, mineral

2.2 - 2.3

Slate

7

Stearite (low loss)

4.4