ASTM D71 Standard Test Method for Relative Density of Solid Pitch and Asphalt (Displacement Method)
4. Summary of Test Method
4.1 The sample is suspended from a thin wire and weighed, first in air, then submerged in water at 25.0°C. The relative density is calculated from these weights.

5. Significance and Use
5.1 This test method is useful in characterizing pitches and asphalts as one element in establishing uniformity of shipments and sources of supply.