Abstract: A layered composite sheet material for temporarily retaining a plurality of lettering elements to be cut therefrom in alignment for subsequent application to a substrate. The composite sheet material includes a release sheet of material not having a melting point of less than 490.degree. F., a display layer which substantially covers one surface of the release sheet and has a melting point higher than substantially 320.degree. F., but lower than that of the release sheet, and a layer of thermally activated adhesive, having a melting point substantially lower then the display layer, covering the surface of the display layer opposite the release sheet.

Abstract: Plastic lettering material having a polyvinyl chloride display layer fused with greater adherence onto a release sheet. Including partially carboxylated polyvinyl chloride in the display layer provides substantially increased adhesion, as does a heat-stabilized polyester release sheet. A layer of non-encapsulating thermoplastic adhesive capable of substantially permanent adherence to a smooth substrate is adhered to the display layer surface opposite the release sheet. Outlines of individual lettering elements which together form a sign content are cut through the adhesive and display layers while the release sheet remains substantially uncut, and that portion of the display and adhesive layers not included in the outlines is stripped away. This leaves the lettering elements firmly adhered to the release sheet, maintaining them in alignment during positioning on and heat bonding to a permanent substrate.