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<h1>Plastic legally defined as moldable organic substances including synthetic polymers and chemically treated natural materials</h1> Legal definitions of 'plastic' encompass organic substances, natural or synthetic, capable of being molded. Technical definitions describe plastics as polymers excluding elastomers and fibers, or engineering mixtures containing resins with various compounds. Dictionary definitions emphasize materials that become shapeable under heat and pressure. Legal interpretation includes high molecular weight materials containing synthetic or semi-synthetic organic substances made through polymerization, condensation, or chemical treatment of natural materials, formed through various processes into diverse objects including films and filaments.