TABLE 4

Physical Properties of Clear Casts

Resin Formulation	A	B	C	D
Tensile Strength, psi	7700	8800	7600	7500
Tensile Modulus, psi	465,000	494,000	444,000	445,000
Tensile Elongation, %	1.8	2.0	1.9	1.8
Flexural Strength, psi	18,400	18,000	14,200	13,700
Flexural Modulus, psi	531,000	516,000	502,000	486,000
Barcol Hardness, Inst. 934-1	50	50	50	50
Heat Distortion, oC	110	107	105	99
After 100 hour water boil
Flexural Strength, % retention	69	66	70	54
Flexural Modulus, % retention	89	90	92	92
Barcol Hardness, % retention	88	90	88	88
Weight Gain, %	0.77	0.81	0.80	0.81