Fragrance bases upright|thumb|A "perfume organ", where perfumers utilize hundreds of essences, in Grasse, France Instead of building a perfume from "ground up", many modern perfumes and colognes are made using fragrance bases or simply bases'''. Each base is essentially modular perfume that is blended from essential oils and aromatic chemicals, and formulated with a simple concept such as "fresh cut grass" or "juicy sour apple". Many of Guerlain's Aqua Allegoria line, with their simple fragrance concepts, are good examples of what perfume fragrance bases are like.
Fragrance bases upright|thumb|A "perfume organ", where perfumers utilize hundreds of essences, in Grasse, France Instead of building a perfume from "ground up", many modern perfumes and colognes are made using fragrance bases or simply bases'''. Each base is essentially modular perfume that is blended from essential oils and aromatic chemicals, and formulated with a simp:le concept such as "fresh cut grass" or "juicy sour apple". Many of Guerlain's Aqua Allegoria line, with their simple fragrance concepts, a:re good examples of what perfume fragrance bases are like.