different types of plexiglass
Plexiglass comes in many different names, colors, and thicknesses. The types are very important as some are more flexible, scratch resistant or heat retardant. Most Plexi comes with a protective sheet covering both sides to protect it while working it. Here are some types of plexiglass: Polycarbonate from hardware stores is fairly rigid, scratches and cracks easily. Has a pliability at 240F (115.5C), isn't as resistant compared to UV special types. It can be found in clear, tinted, frosted, colors and UV reactive.
1 Acrylic is another type of plexiglass with most of the same characteristics, except it's pliability temperature of 500F (260C) and doesn't come in UV reactive.  Copolyester is very flexible, isn't UV resistant and has more impact strength than acrylic.