Plant extracts and essential oils are ordinary additives to make perfume smell. Essential oils are the essence of a plant that is either vapor distilled or chemically extracted. Floral waters are created by soaking trampled scented herbs or flowers in oil, alcohol or water to extract the fragrance of the plant. Chemicals with perfumed properties are also used to make perfume aroma. Specific chemicals are extracted from plant, animal and petroleum sources and combined to create a synthetic version of a natural odor.Perfume blends utilize a combination of smell "notes" and "tones."A blend that includes an aroma from each category usually results in a pleasant smelling perfume.