Examples of substrates selected for the ink jet transparencies include Mylar, commercially available from E. I. duPont; Melinex, commercially available from Imperials Chemical, Inc.; Celanar, commercially available from Celanese; polycarbonates, especially Lexan; polysulfones; cellulose triacetate; polyvinylchlorides; and the like, with Mylar being particularly preferred in view of its availabilit