A test of an oil's distillation properties standardized by the American Society for Testing and Materials. A sample of oil is heated in a flask, the vapors pass through a tube where they are cooled and condensed, the liquid is collected in a graduate. When the first drop of "distillate" is obtained the temperature at which this "initial boiling point" of the oil. The test is continued until all distillable fractions over and have been measured and their properties examined.
