After the great success of the Ethergraf version, we have developed an ink model. In the early 1500s, Leonardo da Vinci focused on the study of flight and the design of a flying machine. He planned to produce a treatise on the flight divided into four chapters that was never completed. In the early months of 1505, however, he wrote part of the Codex on the Flight of Birds, housed in the Royal Library of Turin to unravel the mystery of flight. Inspired by Leonardo's writings, the Piuma writing instrument was born, made entirely of wood with a dynamic shape reminiscent of a feather and flight studies. Piuma rests in constant balance on its centre of gravity, thanks to a mirrored steel base that reflects the master's mirrored signature.