IDES | Search of the Week: Plastics Density

May 8 - 14, 2008 - Plastic density is weight per unit volume of a substance, expressed in grams per cubic centimeter, pounds per cubic foot, etc. - density is the mass of a material per unit volume. In this method the density of a material is determined by the density-gradient technique. A material is placed in a liquid column of variable density with standard floats (glass beads of known density). The material must float between a pair of the floats. The density of the material is then calculated based on its position in the column and the densities of the glass beads.

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