Can the naturally occurring green patina of copper be accelerated by artificial chemicals?
Due to the precise temperature, humidity and chemical requirements, it is generally not recommended that copper be artificially patinated in the field. However, there are field applied prepatination systems that, with proper training, have proven successful. Currently there are U.S. sheet copper fabricators who provide factory-and field-applied prepatination systems under controlled environments. The patina is produced using patented chemical processes result in true patina chemical conversion coatings that carry extensive warranties. The companies providing these finishes are listed in Sheet Copper Manufacturers.