Acid Stains

Campania is proud offer three acid stains for its cast stone products; Terra Nera, Ferro Rustico, and Pietra Vecchia. The deep rich colors of these new stains are a beautiful complement to our existing palette of patinas and creates a bold, new look for the Campania line. The stains are a mixture of water, metallic salts, and muriatic acid. They work by penetrating the surface and reacting chemically with the hydrated lime (calcium hydroxide) in the cast stone. The acid in the stain etches the surface, allowing the metallic salts to penetrate the surface. This process creates a permanent stain in the surface of the concrete which will not flake or peel.

We selected three distinct colors. Terra Nera is a rich, dark, earthy stain of black and brown. Ferro Rustico mimics the appearance of rusty iron. Pietra Vecchia is a combination of browns and greens which imitates the look of weathered stone. We have chosen Italian names for our acid stains to distinguish them from our existing patinas. Like stains for wood, each piece will accept the stain in varying degrees of intensity, creating natural color variations that brings character and distinction to each piece. Even when treated with the same stain under the same process, no two pieces will look exactly alike due to the variance in the composition of the natural materials in the cast stone, as well as the varying ages of the pieces. It is this variability and broad range of tones, rather than uniformity, which give our acid stains their beauty and appeal.  To view variances in our acid patinas, click to view each individual PDF page, Terra Nerra (TN), Ferro Rustico (FR), Pietra Vecchia (PV)

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