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  2. Poly(methyl methacrylate) - Wikipedia

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

    The type of acrylic used in tanning beds is most often formulated from a special type of polymethyl methacrylate, a compound that allows the passage of ultraviolet rays. Sheets of PMMA are commonly used in the sign industry to make flat cut out letters in thicknesses typically varying from 3 to 25 millimeters (0.1 to 1.0 in).

  3. Transparency (projection) - Wikipedia

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

    Transparencies can be printed using a variety of technologies. In the 1960s and 70s the GAF OZALID "projecto-viewfoil" used a diazo process to make a clear sheet framed in cardboard and protected by a rice paper cover. [1] In the 1980's laser printers or copiers could make foil sheets using standard xerographic processes. Specialist ...

  4. Overhead projector - Wikipedia

    en.wikipedia.org/wiki/Overhead_projector

    The recent adaptation of plastic to the manufacture of condenser lenses has permitted a revolutionary redesign of a lecture-demonstration projector, now commonly referred to as an overhead projector. The flat lightweight plastic lens makes possible the use of a large horizontal stage aperture.

  5. Polyvinyl chloride - Wikipedia

    en.wikipedia.org/wiki/Polyvinyl_chloride

    Polyvinyl chloride is formed in flat sheets in a variety of thicknesses and colors. As flat sheets, PVC is often expanded to create voids in the interior of the material, providing additional thickness without additional weight and minimal extra cost (see closed-cell PVC foamboard). Sheets are cut using saws and rotary cutting equipment.

  6. Bubble wrap - Wikipedia

    en.wikipedia.org/wiki/Bubble_wrap

    Bubble wrap Square-shaped bubble wrap for house insulation. Bubble wrap is a pliable transparent plastic material commonly used for protecting fragile items during shipping. . Known for its cushioning air-filled bubbles, it has also become a cultural icon, celebrated for its satisfying popping sound and alternative uses as a stress-relief

  7. Acrylate polymer - Wikipedia

    en.wikipedia.org/wiki/Acrylate_polymer

    Polymethyl methacrylate is the clear break-resistant sheeting sold as acrylic glass (or simply acrylic sheet) or under the trade name Plexiglas, Perspex, etc. Polyacrylates are used in cosmetic products as rheology modifiers and film formers, and these are typically polymers of acrylic acid fluids.

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