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Ferric Nitrate Patina creates a transparent brown patina when applied hot to bronze, brass, and copper. It does not need to be dilutued before use. The final color is determined by the strength of the solution, amount applied, surface preparation, and the temperature of the metal during application. Lighter applications will be transparent golden brown. Additional coats will turn dark burgundy to brown and more opaque. Ferric Nitrate Patina is commonly used over a Liver of Sulfur base to produce a chocolate brown patina. On iron, steel, and zinc, Ferric Nitrate Patina is applied cold and takes hours to develop. On iron and steel, this process generates a stable orange rust. On zinc, the result is a yellow brown finish.
