Distillate Extracts have the most strong base in ancient Ayurveda as Arka kalpana in Arka Prakasha written by Ravana.
Arka prakasha, ancient book on Ayurveda contributed by Ravana has elaborated the importance of - therapeutic utility of essential oils -pharmaceutical SOPs for preparations of distillates from aromatic plants for topical and internal use. In Arkaprakash, various typestypes of Arka(Distilled extracts), its therapeutictherapeutic use and method of preparation are mentioned in detail than in any other text of Ayurveda.
Ravana states that Arkakalpanana is most potent and quick effective preparation. As per expertise of Ravana, it is necessary to to study Arkakalpana for its Pharmacotherapeutic Pharmacotherapeutic utility in the treatment field.