ASTM D937 standard test method for cone penetration of petroleum
4. Summary of Test Method
4.1 The sample is melted, heated to 82°C (180°F), and then cooled under controlled conditions to 25°C (77°F). The penetration is measured with the cone and the sample at this temperature using a penetrometer by means of which a standard cone is applied to the sample for 5 s under a load of 150 g.
5. Significance and Use
5.1 Petrolatum is a purified mixture of semi-solid hydrocarbons obtained from petroleum and is often described as an unctuous mass. Cone penetration is a means of measuring the firmness or consistency of petrolatum. Such measurements are useful for selecting or specifying, or both, a petrolatum of a particular consistency or firmness. Cone penetration values may or may not correlate with end-use functional properties.
