an improved process for preparing transparent shaped articles from a vinylidene chloride polymer , said articles having excellent barrier properties and a high degree of clarity , continuity and flexibility such process comprising preparing a substantially homogeneous admixture from a particulate vinylidene chloride polymer having crystalline melting peaks of at least about 175 ° c . as determined by differential thermal analysis , and a volatile material having dispersed or dissolved therein from about 3 to 20 percent based on vinylidene chloride polymer weight of a nitrile containing elastomer which is compatible with the vinylidene chloride polymer , and wherein the volatile material is a nonsolvent for the vinylidene chloride polymer , then removing the volatile material from the admixture and thermally fabricating the admixture into a shaped article .