What oxidizes copper fastest?

I need to know how to turn copper green fast!! Any ideas? If so tell me about how long it will take!!!!

By using dil. sulphuric acid. (brush it on or something)..It will form copper sulfate, the aqua blue tint seen on old copper. (use adult supervision if necessary).Brush the solution on and wait a few moments for results. To stop the coloration, rinse the acid off with a lot of fresh running water. ****if u are preparing the Dil. sulphuric acid, ALWAYS ADD THE ACID TO THE WATER WITH STIRRING... NEVER ADD WATER TO CONCENTRATED ACID [it could explode in your face]. *just to add to the note and to clarify to in_loora.. You are right but Oxidation is also referred to the charge that an atom would have on a whole...please refer to the second link on my sources...and this is the reaction we are talkin abt wen say oxidation of copper.

RE: What oxidizes copper fastest? I need to know how to turn copper green fast!! Any ideas? If so tell me about how long it will take!!!!

I may be wrong but isn't oxidation caused by oxygen? and doesn't only ferrous metals oxidize? copper is a non ferrous metal void of iron. therefore, copper cannot oxidize. it tarnishes, like silver and gold .