The conversation between human and AI assistant.
[|Human|] Summarize in bullet points some methods used to produce verdigris.
[|AI|] - Hang copper plates over hot vinegar
- Bury copper strips with wooden blocks and acetic acid in dung and dig up weeks later
- Stack copper plates in clay pots of wine
- Combine copper(II) hydroxide and acetic acid
[|Human|] 
Summarize in bullet points some methods used to produce verdigris.