ASTM D 618 - 00 Standard Practice for Conditioning Plastics for Testing

American Society for Testing and Materials (ASTM). Current edition approved Nov. 10, 2000. Published January 2001. 4 p. In general, the physical and electrical properties of plastics are influenced by temperature and relative humidity in a manner that materially affects test results. In order that reliable comparisons may be made of different materials and between different laboratories, it is necessary to standardize the humidity conditions, as well as the temperature, to which specimens of these materials are subjected prior to and during testing. This practice defines procedures for conditioning plastics (although not necessarily to equilibrium) prior to testing, and the conditions under which they shall be tested.