Italian citrus zest

Perfumers obtain Italian citrus zest oil by cold expression, a mechanical pressing that squeezes fresh peel without heat. The process begins with hand‑picked lemons and oranges harvested at peak ripeness in the Amalfi coast. Workers wash the fruit, then feed the whole peel into a rotating drum where gentle pressure extracts the volatile oil. The oil separates from the aqueous phase and flows into stainless‑steel collectors. Because the method avoids high temperatures, delicate molecules such as limonene, citral, and β‑pinene remain intact, preserving the zest’s bright character. After extraction, the oil is filtered through fine mesh, then stored in amber glass bottles under nitrogen to prevent oxidation. In 2022, Italian producers reported an average yield of 1.5 ml of oil per kilogram of zest, demonstrating the efficiency of cold expression for large‑scale perfumery.