| Answer | Crossword Clue |
|---|---|
| ETCH | Draw with nitric acid. |
| ETCH | Draw with acid. |
| ETCH | Draw with acid |
| AQUA | .. fortis (nitric acid) |
| FORTIS | Aqua .. (nitric acid) |
| AQUA | ... fortis (nitric acid) |
| FORTIS | Aqua ... (nitric acid) |
| REGIA | Aqua .. (nitric acid mixture) |
| NITRATE | Salt of nitric acid. |
| AQUA | ... fortis (another name for nitric acid) |
