A range of rigid, light weight, weather resistant plastics, used commonly in the form of sheets, films, rods, and fibers, as well as in their liquid state for casting, coating, and adhesives. Acrylics are notable among plastics for their resistance to chemical change, making them valuable for their permanence, and in art conservation. Acrylics may be made transparent, translucent, or opaque, and are available in a range of colors.Also see cellocut, coated paper, fiberglass, and polyester resins.