Number | Concentrated acid | processing time (min) |
CK | - | - |
A1 | concentrated hydrochloric acid | 30 |
A2 | concentrated hydrochloric acid | 35 |
A3 | concentrated hydrochloric acid | 40 |
B1 | concentrated sulfuric acid | 2 |
B2 | concentrated sulfuric acid | 4 |
B3 | concentrated sulfuric acid | 6 |