What is ab absolute? Absolutes are used in perfumery and aromatherapy, absolutes are similar to essential oils. They are concentrated, highly aromatic, oily mixtures extracted from plants. Whereas essential oils are produced by distillation, boiling or pressing, absolutes are produced through solvent extraction, or more traditionally, through enfleurage. In the photo you are seeing the Tonka beans, these beans are processed in organic solvent to produce a thick substance that in normal temperature looks like brown sugar.