Refers to the various processes used to yield fragrance products and materials out of organic sources. The goal is to produce usable substances for the production of fragrances and perfumes, and can be achieved through a variety of measures. Some of the most common methods include: solvent extraction, distillation, pressing, and expression — or the similar process, enfleurage. Resins can be yielded from certain materials through the tapping of roots and heartwoods; resins, of which can be put through one or more of the previously mentioned processes, for a range of specifically desired outcomes. Some processes will yield one type of compound, whereas others are designed to produce another, so the extraction method depends upon what substance is intended to be created. The ratios of fatty compounds to aromatic elements in a substance determine what type of substance it will be classed as, which can mean it to be labelled either as an essential oil, a concrete, an absolute, or as a butter. Certain techniques for extraction are detrimental to the vitality of the aromas in some materials, which is partly responsible for the array of different methods that exist. For example, jasmine and tuberose were, throughout the ages, largely left in their raw forms, until a method known as enfleurage was invented, which allowed the extraction of aromatic compounds from the plants without damaging the integrity of the fragrances.