-- G3UPA -- ebooks-4-u.biz -- Birmingham, UK --

Relative permittivity (dielectric constant or K) ===============================
Vacuum	1.0000		Air	1.0006
PTFE, FEP ("Teflon")	2.0 to 2.1		Polypropylene	2.20 to 2.28
ABS resin	2.4 to 3.2		Polystyrene	2.45 to 4.0
Waxed paper	2.5		Transformer oil	2.5 to 4
Hard Rubber	2.5 to 4.80		Wood (Oak)	3.3
Silicones	3.4 to 4.3		Bakelite	3.5 to 6.0
Quartz, fused	3.8		Wood (Maple)	4.4
Glass	4.9 to 7.5		Castor oil	5.0
Wood (Birch)	5.2		Mica, muscovite	5.0 to 8.7
Glass-bonded mica	6.3 to 9.3		Porcelain, Steatite	6.5
Alumina	8.0 to 10.0		Distilled water	80.0
Barium-strontium-titanite	7500
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