![]() Difficulty: This is a hot application.Long term atmospheric exposure generally results in the formation of the naturally protective gray-green patina. Chemical compound: Ferric nitrate, Copper sulfide Copper and its principal architectural alloys are relatively active metals which, when left unprotected, tend to oxidize (weather).Difficulty: Altering the strength can push the color from golden brown to yellow.Can be combined with ferric nitrate solutions to adjust color. Chemical compound: Copper nitrate, Copper chloride.Can be layered with potassium sulfide or ferric nitrate solutions to adjust color. ![]() Difficulty: Several proprietary mixtures available.Chemical compound: Copper acetate, Copper carbonate, Copper nitrate, Copper sulfate.Several proprietary mixtures are available. Chemical compound: Ferric nitrate, Potassium sulfide, Copper sulfide.There are a number of proprietary mixtures. Chemicals have pungent odors and short shelf lives. Chemical compound: Potassium sulfide, ammonium sulfide, hot sodium hydroxide.When some maintenance is performed, bronze sculptures can last centuries and appear as if they were cast in recent times. However, one only has to look at the ancient sculptures that have been residing under the sea for centuries to observe that they are still intact and recognizable. The sculpture, on the other hand, is undergoing surface changes that are irreversible and can damage the original design intention. The copper roof is allowed to oxidize and grow a beautiful green tone that resists further oxidation, as shown on the Berlin Cathedral or the 1909 spire on the Nikolaj Contemporary Art Center. Although the results are similar, the consequences are far different. The rich green color on a copper roof and the oxidation of a bronze sculpture in a fountain are both manifestations of the natural progression of surface decay. It does not store any personal data.Natural green copper patinas form over time via the interaction of moisture, pollution, chlorides, and carbon dioxide on the surface of copper and copper alloys. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Rust will occur if a clear sealer is not applied.įor more information and help check out this awesome guide by Sculpt Nouveau *HERE* Dry after rinsing and between applications, making sure to remove the film left by the patina. Water rinsing is a good neutralizer and will not cause rust. It should not be diluted unless you are working on the Metal Coatings.īefore applying this patina, sandblasting or sanding and cleaning is required to remove the oil, oxides, and residues. Black Magic Patina does not work on stainless steel or aluminum. On zinc and galvanized steel, it creates a weathered black patina. ![]() Rust will develop if a clear sealer is not applied to the completed finish.Black Magic Patina works similarly on bronze, brass, and copper to darken the metal. The first coat will be dark grey, but the finish will become black after a few coats. It takes only 3-5 minutes to develop and does not produce the quick rust that you normally see with other blackening agents. Black Magic Patina creates a beautiful, rich black patina on iron and steel.
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