Abstract: A process of fabricating weather resistant signage by screen printing indicia on a UV-treated impregnated polyester protective film using a Cellosolve acetate-based ink. The resulting sign is extremely resistant to solar UV, thus preserving the indicia brightness and clarity for a very long period of time even under the most extreme conditions. The screen printing process of the preferred embodiment comprises the steps of first preparing a film image, then preparing a fabric mesh ranging from 125 to 230 mesh for black and white images and ranging from 355 to 425 mesh for halftone color images. The fabric mesh is attached to a stencil and the film image is attached to the stencil. The combination is placed into a vacuum frame for exposure to high intensity light, after which the stencil is washed with pressurized water, dried by fan, taped and touched up for pinholes or other blemishes.