SummaryA very simple, rapid, reproducible method of refining crude cottonseed oils, for refined color measurement, has been developed. The results can be used to predict the colors of these oils when refined by the American Oil Chemists' Society Cup Method.The method has the advantages of rapidity and use of simple equipment and techniques and requires only small quantities of oil. Furthermore variations in results because of the amount and strength of lye and of “break” are not encountered since uniform conditions are employed.Because the method is used when it is desired to measure refined color without determining refining loss, it is not a substitute for the official cup refining method.