im putting together an experiment to create spice completely of organicly made materials. my first question is the nature and methods for making sodium hydroxide or lye, iv found several methods for making potash or potassium carbonate, but every method iv found for making lye describes the same procedure exept for filtering through straw. does anyone have any insight on the nature of the two and could potash be substituted for lye? also are questions about the naphtha (sp?). could a 200 proof spirits of red wine alcohol be substituted for it, or is there a special quality to the naphtha? any help would be extremely appreciated.