Essential oil is the volatile complex aromatic mixture of the plant. Steam distillation is used to separate oil from the respective plant species. Contains terrpenes, alcohols, aldehydes, ketones and esters etc. Essential oils are used in the pharmaceuticals, perfume and food flavouring industry.
Oleresin is solvent extracted concentrated spice flavour and aroma containing both volatile essential oil and also non volatile aroma component. It represent total flavour of the spice in concentrated form where large quantity of spice could be replaced by small amount of true spice extract. Among many advantages the product could be stored in a small container and could keep for many years with out any change of its true spicy flavour.