A process for preparing a polarizer is described whereby a pre-polarizing article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a thermal acid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcoholpoly copolymer. The mechanical device includes a plurality of segmented portions interconnected consecutively at pivoted junctions. In the printer server, printing data input from a terminal device is converted into bit map data via an RIP processor, and the bit map data is transmitted from the printer driver to two of the same kind of printing devices. To use the tie-wrap, the user cuts a piece from the flexible strap bundle and inserts its ends into a locking part and pulls one or both ends of the strap until it is tightly wrapped around the object. By releasing the bottom trigger member, the top trigger member moves laterally inwardly causing the locking pin to be received within an aperture in the inner sleeve so as to interlock the inner sleeve within the outer sleeve at the approximate desired length of the extension pole. A heated seal bar secures the film to the flanges of the zipper.