Geometric Density or Envelope Density

One of the most common density measurements involves the determination of the geometric space occupied within the envelope of a solid material... including any interior voids, cracks or pores. This is called geometric, envelope or bulk density and only equals true density when there are no internal openings in the material being measured.

The volume of irregularly shaped samples can be determined by dry powder displacement using a free-flowing powder and a measuring cylinder, and preferably an Autotap to reproducibly compact the powder around the piece being measured.