Conical percolators are used for processing traditional Chinese medicines using the extraction technique. The extraction solvent is continually added after the powdered medicinal material is put to the percolation tank, and the percolation extract is simultaneously collected. The percolation apparatus is uncomplicated. Conical percolators are also utilized for filtering solvents by running the solvent (typically alcohol or alcohol plus water) through a powdered herb very slowly. The solvent is able to extract the herbal ingredients into a preserved product. It then drips out of the powdered herb through a filtering bottom container. This product is extremely efficient and strong in construction.