Acrylic plexiglass and polycarbonate sheets are both strong and durable plastic sheets with top-of-the-line visual possibilities. With these materials having such great qualities it makes them the go-to material for most lighting applications, including commercial lighting, lenses, interior LED and conventional lighting fixtures. May 20, 2014 · Colored overlays are thick, sturdy and transparent 8 1/2 inch by 11 inch sheets you place over your books and your computer screen. Reading specialists have used them for years to quickly clear up print that is distorted on the page and help a child or student see the page clearly – thus raising reading scores almost immediately! In truth, acetate film and sheets are a specific type of plastic material called cellulose acetate, which is derived from natural sources like wood pulp and cotton. Acetate as a polymer is not only used for making plastic film, but also for making tool handles, eye-glass frames, and as an component of many medical and food industry products.