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| Metal | Etchant | Ratio | |
|---|---|---|---|
| Aluminum | H2O/HF | 1:1 | |
| HCl/HNO3/HF | 1:1:1 | ||
| Antimony | H2O/HCl/HNO3 | 1:1:1 | |
| H2O/HF/HNO3 | 90:1:10 | ||
| Bismuth | H2O/HCl | 10:1 | |
| Chromium | H2O/H2O2 | 3:1 | |
| Cobalt | H2O/HNO3 | 1:1 | |
| HCI/H2O2 | 3:1 | ||
| Copper | H2O/HNO3 | 1:5 | |
| Gold | Hot | HCl/HNO3 | 3:1 |
| Hafnium | H2O/HF/H2O2 | 20:1:1 | |
| Indium | Hot | HCl/HNO3 | 3:1 |
| Iridium | Hot | HCl/HNO3 | 3:1 |
| Iron | H2O/HCl | 1:1 | |
| H2O/HNO3 | 1:1 | ||
| Lead | Acetic/H2O2 | 1:1 | |
| Magnesium | Hot | H2O/NaOH | 10:1 by weight |
| Followed by | H2O/CrO3 | 5:1 by weight | |
| Molybdenum | HCI/H2O2 | 1:1 | |
| Nickel | HNO3/Acetic/Acetone | 1:1:1 | |
| HF/HNO3 | 1:1 | ||
| Niobium | HF/HNO3 | 1:1 | |
| Palladium | Hot | HCl/HNO3 | 3:1 |
| Platinum | Hot | HCl/HNO3 | 3:1 |
| Rhenium | Hot | HCl/HNO3 | 3:1 |
| Rhodium | Hot | HCl/HNO3 | 3:1 |
| Ruthenium | Hot | HCl/HNO3 | 3:1 |
| Silver | NH3OH/H2O2 | 1:1 | |
| Tantalum | HF/HNO3 | 1:1 | |
| Tin | HF/HCl | 1:1 | |
| HF/HNO3 | 1:1 | ||
| HF/H2O | 1:1 | ||
| Titanium | H2O/HF/HNO3 | 50:1:1 | |
| H2O/HF/H2O2 | 20:1:1 | ||
| Tungsten | HF/HNO3 | 1:1 | |
| Vanadium | H2O/HNO3 | 1:1 | |
| HF/HNO3 | 1:1 | ||
| Zirconium | H2O/HF/HNO3 | 50:1:1 | |
| H2O/HF/H2O2 | 20:1:1 |