1.1 ,This classification system covers polychlorotrifluoroethylene (PCTFE) plastics that consist of at least 90 ,% chlorotrifluoroethylene and are suitable for extrusion and for compression and injection molding. Additional components allow for chemical modifications, such as co-monomers, but not colorants, fillers, plasticizers, or mechanical blends with other resins. This classification system does not cover recycled PCTFE materials.