Water spray | Ultrason bath | Phosphoric acid | Steam | |
---|---|---|---|---|
Group E | 16.92 (3.55) b | 15.15 (3.82) cb | 14.00 (2.49) cb | 14.70 (3.01) cb |
Group E/S | 14.22 (3.21) cb | 21.06 (4.06) a | 11.90 (2.49) c | 12.49 (3.63) cb |
Group E/S+ | 12.05 (2.37) c | 15.93 (2.53) cb | 14.18 (3.44) cb | 16.25 (4.42) cb |