| Independent variables | −α | −1 | 0 | +1 | +α | |||||||||||||
| Saturated steam pressure P (kPa) | 200 | 300 | 400 | 500 | 600 | |||||||||||||
| Processing time (s) | 10 | 15.9 | 30 | 44.1 | 50 | |||||||||||||
| Trial N˚. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | |||||
| Pressure (kPa) | 400 | 600 | 400 | 400 | 540 | 540 | 400 | 260 | 260 | 400 | 200 | 400 | 400 | |||||
| Time (s) | 30 | 30 | 50 | 30 | 44.1 | 15.9 | 30 | 15.9 | 44.1 | 30 | 30 | 10 | 30 | |||||