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2. Transparency (projection) - Wikipedia

   en.wikipedia.org/wiki/Transparency_(projection)

   Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.

3. Plastic film - Wikipedia

   en.wikipedia.org/wiki/Plastic_film

   Plastic film is a thin continuous polymeric material. Thicker plastic material is often called a "sheet". These thin plastic membranes are used to separate areas or volumes, to hold items, to act as barriers, or as printable surfaces. Plastic films are used in a wide variety of applications.

4. Cellophane - Wikipedia

   en.wikipedia.org/wiki/Cellophane

   Cellophane is a thin, transparent sheet made of regenerated cellulose. Its low permeability to air , oils , greases , bacteria , and liquid water makes it useful for food packaging . Cellophane is highly permeable to water vapour , but may be coated with nitrocellulose lacquer to prevent this.

5. Polystyrene - Wikipedia

   en.wikipedia.org/wiki/Polystyrene

   [citation needed] It must be concealed behind drywall, sheet metal, or concrete. [117] Foamed polystyrene plastic materials have been accidentally ignited and caused huge fires and losses of life, for example at the Düsseldorf International Airport and in the Channel Tunnel (where polystyrene was inside a railway carriage that caught fire). [118]

6. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   It is a transparent thermoplastic, used as an engineering plastic. PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Hesalite, Plexiglas, Acrylite, Lucite, and Perspex, among several others . This plastic is often used in sheet form as a lightweight or shatter-resistant alternative to glass. It can ...

7. At least 5 shows canceled after drones fell from the sky at ...

   www.aol.com/least-5-shows-canceled-drones...

   At least five drone shows have been canceled, or have paused the use of the systems, after several drones struck a crowd at a holiday show in Orlando on December 21.. Universal Orlando, Orlando ...