Only a few short years ago, plastics were best known for their insulating properties and great strides were made in electronics, in electrical equipment, and in electrical component design as the dielectric strength of plastics was improved. The whole field of thermal insulation was advanced as ways were found to generate better plastic fibers and foams which could give an order of magnitude better insulation than ever before. And yet, today many of us are spending our time looking for ways to make plastics into better conductors-better conductors of electrons and better conductors of heat. Our reasons are as varied as the many fields from which we come, but they are all related to the fact that plastics have many other very valuable properties aside from their insulating abilities. To make full use of these in many applications, plastics should be electrically and/or thermally conducting.