Hydrosols

Suzanne Catty, author of Hydrosols: The Next Aromatherapy proposes the following definition:

 

"Hydrosols are the condensate water co-produced during the steam- or hydro-distillation of plant material for aromatherapeutic purposes."

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[Suzanne Catty, Hydrosols: The Next Aromatherapy (Rochester, VT: Healing Arts Press, 2001), 10.]