change in either the longitudinal or transverse directions when subjected to a thermal stability test in which the substrate is printed upon in a laser printer in another embodiment of the invention the substrate shows no dimensional change in longitudinal or transverse direction when subjected to a thermal stability test in which the substrate is printed upon in a laser in an embodiment of the present invention the cross linked coating is selected from the group consisting of vinyl ester unsaturated polyesters alkyds epoxies phenolic resin polyisocyanate polyurea polyacrylates polyamides perfluoro acrylates cyanoacrylates polyurethane polyethylene cellulose and combinations in another embodiment of the present invention the polyethylene planar substrate is in a form selected from the group consisting of film woven non woven and any combination thereof in another embodiment of the present invention the polyethylene planar substrate comprises a plexifilamentary web in still another embodiment of the invention the coating further comprises fillers that are selected from the group consisting of sodium acetate potassium acetate sodium iodide calcium sulfate silica calcium carbonate titanium dioxide silver nanoparticles photoluminiscent materials uv reactive pigments carbon black and any combination thereof in another embodiment the layer of polyethylene is metallized on at least one side prior to coating another aspect of this invention is a process for preparing a planar substrate comprising the steps of providing a planar polyethylene substrate applying a coating solution to the polyethylene substrate curing the coated polyethylene at a temperature between 20 and 130 u00b0.