Percolation

Percolation is a method of extraction. The process involves filtering a menstruum through finely powdered, dried herbs that have been packed into a cone-shaped percolator. The herb is traditionally moistened with a small amount of menstruum for 12 to 24 hours to allow for in-cone maceration and expansion. After, the remaining menstruum is poured over the herbs and the liquid extract slowly drips out, as gravity pulls the menstruum down through the herb.