Definition of synthetic resin clarifies scope and industry usage, distinguishing plastics from textile materials for classification purposes. The term resin now includes synthetic, high molecular weight polymeric materials-thermoplastic or thermosetting-produced by polymerization or condensation and used chiefly as plastics, in coatings, adhesives, ion exchanges and molding operations; industry classification rests on reacting materials or chemical composition, and the term typically denotes unfabricated feedstock (resin) as distinct from the fabricated article (plastic).