It is the oils derived from nature’s plant and flower material that are used to make perfume. There are six methods by which oils are extracted from plants. These include: steam distillation, boiling, solvent extraction, enfleurage, maceration and expression. In the first method, steam passing through the plant material turns the essential oil into gas, which is then passed through tubes, cooled and liquefied. In the boiling process, oils can be extracted by boiling flower petals in water.