Oxidized Bronze numbers and letters are water-jet cut from flat sheets of bronze in the various thicknesses mentioned in the table above. The faces of these pieces are then brushed. The returns are bead-blasted. The pieces are then oxidized by submersion in a chemical solution to darken the bronze into either a dark, medium, or light finish.
For the final step, the returns are tinted a very dark brown and then the faces and returns are clear-coated and baked with a glossy 2-part hardened acrylic polyurethane clear coat.
Our solid, oxidized, bronze numbers and letters are water-jet cut from lead and mercury-free alloy C22000 (nominal: Cu 90 Zn 10).
NOTE: The oxidized bronze finish will very slowly darken over time. This process is accelerated in damp or marine environments which eventual break down cover coats. For a fixed color of bronze oxidation, please consider the bronze tints, among others, of anodized aluminum.