Note:  Do not rely on this information. It is very old.

Imperial Green

Imperial Green, also known as emerald green, consists of the double arsenite and acetate of copper. It has a fine green colour, and is a very permanent pigment, being unaffected by exposure to the atmosphere, but possesses the disadvantage of being of a very poisonous nature.

“Are you dejected? here is comfort. Are you sinful? here is righteousness. Are you led away with present enjoyments? here you have honours, and pleasures, and all in Christ Jesus. You have a right to common pleasures that others have, and besides them you have interest in others that are everlasting, that shall never fail; so that there is nothing that is dejecting and abasing in man, but there is comfort for it in Christ Jesus.”
–Richard Sibbes, Description of Christ