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Inside Officine Fratelli Bambi, every new technique begins with a question.

What happens if fire becomes more than a tool for shaping metal? What if it could become the brush itself?

For artisan Lorenzo Carcasci, the answer took time to discover.

Having spent more than three decades at La Marzocco mastering welding and metalworking, Lorenzo began experimenting with copper in search of a way to reveal the material’s own character rather than covering it. Instead of applying color to the surface, he introduced a controlled flame directly onto the metal, allowing heat and oxygen to naturally transform it.

The result became known as the Fiammata Technique.

Unlike traditional finishing methods, Fiammata uses no paints, inks or chemical pigments. Every color visible across the copper is created through oxidation—the metal’s natural response to carefully controlled heat. As temperature changes across the surface, copper develops a spectrum of colors ranging from warm ambers and reds to deep blues and purples.

Controlling those colors, however, proved far more complex than creating them.

Lorenzo refined every movement of the flame, learning how subtle changes in distance, speed and temperature would permanently affect the finished surface. Equally important was developing a protective finish capable of preserving those colors without altering their natural appearance.

The result is a technique that cannot be copied.

Every pass of the flame reacts differently. Every sheet of copper responds in its own way. No two surfaces will ever carry the same marks.

Like a fingerprint, each piece becomes an original.

The first complete application of the Fiammata Technique appeared on the Officine Fratelli Bambi Aztechina Linea Mini and the Fiammata OFB, created to honor one of football’s most iconic stages—Estadio Azteca. The living surface of the copper echoed the emotion, ritual, and energy that inspired the project itself.

Today, Fiammata becomes part of the permanent craft language of Officine Fratelli Bambi.

Alongside cutting, bending, forming, machining and welding, it represents another skill developed entirely inside the workshop in Florence. Not simply a finish, but a new way of expressing the handmade philosophy that has defined La Marzocco for nearly a century.

Because when fire leaves its mark, it tells a story that can never be repeated.