You know What is the essential oil

Essential oils from plants flowers or fruit, leaf, stem, root, through steam distillation, extrusion method, quenching method or solvent extraction distillation extraction of volatile aromatic matter. Essential oil can dilute (compound essential oil) and without dilution (essential oil). The volatility of essential oil is very strong, once in contact with air will quickly evaporate, also for this reason, essential oil must be sealed bottles can be stored, once open a bottle of use, also want to cover the lid back as soon as possible. Refined oil from four levels: 4 (D) : sweet Ti dew, pure dew or hydrosols; The third level (C) : perfume level; The second level (B) : food grade; The first level (A) : pure essential oil