This International Standard establishes a system of symbols for the basic rubbers in both dry and latex forms, based on the chemical composition of the polymer chain. The purpose of this International Standard is to standardize the abbreviated terms used in industry, commerce, and government, and it is not intended to conflict with, but rather to act as a supplement to, existing trade names and trademarks. NOTE 1 It is intended that in technical papers or presentations, the name of the rubber be used, if possible. It is intended that the symbols follow the chemical name for use in later references. NOTE 2 The nomenclature of thermoplastic elastomers is described in ISO 18064[1].