For every unit of plant material, prepare nine units of water. First dissolve one unit of salt, then dissolve one unit of lye. Let the water cool and add the plant material. Let it stand for a day. After a day, warm the basifed soup in a water bath to body temperature, then add one unit of naphta, shake and let it settle, repeat this three times. Take off the naphta. Repeat this (adding fresh naphta, shaking and siphoning it of) at least three times. Collect the naphta and put it in the freezer. More naptha extractions may yield more product.