Formulation F1 F10 F11
No.1 (N) 41 40 40
No.2 (N) 40 41 40
No.3 (N) 42 42 41
No.4 (N) 41 41 42
No.5 (N) 42 40 42
No.6 (N) 41 42 41
No.7 (N) 40 41 40
No.8 (N) 41 42 41
No.9 (N) 42 41 42
No.10 (N) 41 40 41
Table 3: The hardness of F1, F10, F11.