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2. Blackout (fabric) - Wikipedia

   en.wikipedia.org/wiki/Blackout_(fabric)

   The process of manufacturing blackout was invented by Baltimore-based Rockland Industries, [2] and involves coating a fabric with layers of foam, or 'passes'. A '2-pass' blackout is produced by applying two passes of foam to a fabric – first, a black layer is applied to the fabric, then a white or light-colored layer is applied on top of the black.

3. Blackout (wartime) - Wikipedia

   en.wikipedia.org/wiki/Blackout_(wartime)

   A blackout curtain used in Auckland, New Zealand during World War II. Lights can simply be turned off or light can sometimes be minimized by tarring the windows of large public structures. In World War II, a dark blackout curtain was used to keep the light inside. Tarring the windows can mean a semi-permanent blackout status.

4. Curtain wall (architecture) - Wikipedia

   en.wikipedia.org/wiki/Curtain_wall_(architecture)

   Curtain walls may be designed as "systems" integrating frame, wall panel, and weatherproofing materials. Steel frames have largely given way to aluminum extrusions. Glass is typically used for infill because it can reduce construction costs, provide an architecturally pleasing look, and allow natural light to penetrate deeper within the ...

5. Theater drapes and stage curtains - Wikipedia

   en.wikipedia.org/wiki/Theater_drapes_and_stage...

   There is also a form of drop used in Vaudeville days, which may still be seen in older theaters, called an olio. "Olio" means conglomeration, and these drops were most often roll-drops covered with advertisements from various sponsors, for the audience to view between shows. An olio drop is a similar curtain, but lowered at the front of the stage.

6. Front curtain - Wikipedia

   en.wikipedia.org/wiki/Front_curtain

   The Venetian curtain, also known as a profile or contour curtain, also has multiple vertical lines distributed across the length of the single panel of fabric (which is usually made with as much as 200% fullness and must be thin and soft so it gathers well). [5] [6] The curtain is opened by pulling on the lines. Unlike the Austrian, each line ...

7. Brownout (electricity) - Wikipedia

   en.wikipedia.org/wiki/Brownout_(electricity)

   A linear DC regulated supply will maintain the output voltage unless the brownout is severe and the input voltage drops below the drop out voltage for the regulator, at which point the output voltage will fall and high levels of ripple from the rectifier/reservoir capacitor will appear on the output.