Sfumatrice Process
The sfumatrice equipment consists of a metallic chain that is drawn by two horizontal
ribbed rollers. The peels are conveyed through these rollers during which time they are pressed
and bent to release their oil. As in pelatrice, the oil is washed away from the sfumatrice rollers
by fi ne sprays of water. Again, the oil is initially passed through a separator prior to being sent
to two centrifuges in series, so that purified oil can be produced. At one time, sfumatrice was the
most popular process for citrus oil isolation in Italy; however, today the pelatrice method
appears more popular.