TABLE 5
Physical Properties of C581 Laminates
| Resin Formulation | A | B | C | D |
| Flexural Strength, psi | 14,200 | 14,200 | 13,700 | 14,400 |
| Flexural Modulus, psi | 833,000 | 802,000 | 836,000 | 765,000 |
| Barcol Hardness, Inst. 934-1 | 50 | 50 | 50 | 50 |
| Glass Content, wt. % | 24.5 | 23.7 | 23.5 | 24.2 |