Copper verdi finish?

[Ocean Spray]

What would you apply to sheet copper to get that light green oxidized verdi finish?

[MiddleAgesMan]

Air.

[Ocean Spray]

Wrong, I have done copper signs that were made with copper sheeting and out in the air they oxidized to a very dark shade.
I am looking to oxidize the copper to a light turquoise shade. And I mean what would you use to do it quickly.

[TimH]

pee on it.

[Jay Greer]

I use a variety of chemicals in my conservator work. This is the company I deal with.
http://www.artchemicals.com/Pre_Mixed_Solutions_s/163.htm
Although I mix my own from dry chemicals. I would recommend using their pre-mixed solutions. Common table salt and vinegar and water mixed with sal ammoniac is a basic patina producing solution. The addition of potash will produce a brown patina. For better results go with their formulas.
Jay

[J P]

Another source.
http://www.jaxchemical.com/products.html
Prepwork/cleaning is key too.

One more. (I've used this one but not the above.)
http://ssschemical.com/index1.html

[S B]

Wrong, I have done copper signs that were made with copper sheeting and out in the air they oxidized to a very dark shade.
I am looking to oxidize the copper to a light turquoise shade. And I mean what would you use to do it quickly.
Tent the sign with plastic and expose it to strong vinegar fumes, create a coating of verdigris ,copper acetate. The dark colour is cuprous oxide.

[Robert W. Long]

Thank you Jay Greer! This looks like an exellent link and I for one will surely give them a try.