Patina refers to the natural or artificially induced aging process that occurs on metal surfaces over time. Traditionally, it’s seen on metals like copper, bronze, brass, and iron, giving them a distinct green, blue, or brownish color due to oxidation and exposure to elements like air and moisture. The patina effect can be both natural and artificial, with the latter being more common for decorative purposes in modern manufacturing.

The patina finish not only enhances the aesthetic appeal of metals but also provides a protective layer, preventing further corrosion and damage. The resulting surface can be matte, glossy, or textured, depending on the desired effect.