a plastic sheet product having a matte finish comprises a core layer of a thermoplastic polymer and at least one layer of a capstock composition which overlies , and is bonded to , at least one face of the core layer . the capstock composition comprises the same or different thermoplastic polymer and contains a plurality of discrete particles immiscible with and dispersed in the thermoplastic polymer of the capstock composition . the sheet product may be prepared by the co - extrusion of the thermoplastic polymer and the capstock composition , and in a particular embodiment , such co - extrusion may be conducted by means of a feedblock . in a particular embodiment , the thermoplastic polymer of the core layer and that of the capstock composition may be the same , such as in the instance of a methylmethacrylate - methylacrylate copolymer . sheet products prepared in accordance with the invention exhibit improved post - processability and ease of surface maintenance , and may be fabricated into a variety of products including light diffusers , projection screens , and the like .