Clarify oil by boiling with water. Heat freshly-extracted oil with a specified amount of water added. Pour off oil when most of the water has been boiled out, leaving the coagulated solids at the bottom of the container. Strive to leave a solid residue which contains a minimal amount of residual oil.
DATA SOURCED FROM ESCO (EUROPEAN COMMISSION) & O*NET (U.S. DEPARTMENT OF LABOR)