| Furnace Charge Composition | Non-desulfurized lead paste | Desulfurized lead paste | ΔSO2 |
| SO2 [mg/Nm3] | SO2 [mg/Nm3] | SO2 [mg/Nm3] | |
| [5]-[5]-[3] | 3064 ± 189 | 1643 ± 101 | −1421 ± 101 |
| [7.4]-[7.4]-[5.3] | 2149 ± 133 | 299 ± 18 | −1850 ± 134 |
| [8]-[8]-[5] | 1366 ± 84 | 1078 ± 67 | −288 ±18 |