Perfume consists of natural or synthetic fragrance oil extracts diluted in water or high-grade alcohol. The difference lays in the amount or concentration of oils in the fragrance. The higher the concentration of oils, the longer the fragrance will last.
Most designers like to produce the whole line of fragrances.
Eau de Cologne – 4% essential oils. Lasts about 1 hour.
Eau de Toilette – 8% to 15% essential oils. Lasts about 2 – 3 hours.
Eau de Perfume (Parfum) – 15 to 22% essential oils. Lasts 3 – 6 hours.