| PVA | Concentration of boric acid (wt.%) | Tensile strength (kg/cm2) | ||
| 2 Hrs | 6 Hrs | 24 Hrs | ||
| PH PVA | 0 | 25.6 | 44.8 | 47.2 |
| 0.5 | 24.8 | 47.2 | 48.8 | |
| 1 | 32.8 | 52.8 | 65.6 | |
| 1.5 | 52.8 | 57.6 | 68.4 | |
| FH PVA | 0 | 41.6 | 43.2 | 57.6 |
| 0.5 | 49.6 | 56 | 62.4 | |
| 1 | 42.6 | 58.4 | 65.6 | |
| 1.5 | 52.8 | 60.8 | 70.4 | |
| M PVA | 0 | 16.8 | 23.2 | 27.2 |
| 0.5 | 17.6 | 25.6 | 27.2 | |
| 1 | 17.8 | 28.8 | 31.2 | |
| 1.5 | 18.4 | 30.9 | 30.4 | |