aqua fortis
dblum | March 30, 2010A couple days ago, I wrote a post (Tyger, Tyger, Copper, Copper) about the theory that the late, great British poet William Blake (1757-1827) and been killed by copper poisoning due to years of acid-etching copper plates as a print maker.
One chemist promptly wrote to raise the possibility that it might instead have been acid poisoning. Blake used nitric acid to etch his plates and exposure to that corrosive compound, he pointed out, turns the skin yellow. One symptom of Blake's final illness was his deeply yellowed skin.
Nitric acid - sometimes called engraver's acid - has a long and…