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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. 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.

4. Color gel - Wikipedia

   en.wikipedia.org/wiki/Color_gel

   Modern gels are thin sheets of polycarbonate, polyester or other heat-resistant plastics, [2] placed in front of a lighting fixture in the path of the beam. Gels have a limited life, especially in saturated colors (lower light transmission) and shorter wavelength (blues). The color will fade or even melt, depending upon the energy absorption of ...

5. 50 Times Cheap Fixes Had A Major Impact On Home Life - AOL

   www.aol.com/55-people-share-relatively-cheap...

   Put in dimmable 6" flat LED ceiling lights. Got rid of three table lamps and a chandelier in the process. Absolutely transformative. The living and dining room look a lot more spacious now as well ...

6. 9 Dusting Mistakes That Just Lead to More Dust - AOL

   www.aol.com/lifestyle/9-dusting-mistakes-just...

   "Folding your cloth neatly and keeping it flat will make the cloth easier to control and will provide the best clean," says Touray. ... light switches, baseboards, and light fixtures for a ...

7. 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).