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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.
Various window blind styles. A window blind is a type of window covering. [1] There are many different kinds of window blinds which use a variety of control systems. A typical window blind is made up of several long horizontal or vertical slats of various types of hard material, including wood, plastic or metal which are held together by cords that run through the blind slats.
Metal facade cladding at a gymnasium – built 2023. Rainscreen cladding is a kind of double-wall construction that utilizes a surface to help keep the rain out, as well as an inner layer to offer thermal insulation, prevent excessive air leakage and carry wind loading. The surface breathes just like a skin as the inner layer reduces energy losses.
A wipe curtain, named after the film editing technique called a wipe, is a single large curtain that is rigged in a manner similar to traveler curtains. Unlike travelers, which consist of two curtains that part at center stage, a wipe opens from the left or right side of the proscenium and travels horizontally across the entire stage.
This allowed quicker shutter-curtain travel time (3.6 milliseconds, about half of earlier vertical, metal bladed shutters) and thereby truly faster shutter speeds. [251] The Nikon FE2 (Japan), with an improved version of this shutter, boosted X-sync speed to 1/250 sec. (3.3 ms curtain travel time) in 1983. [ 252 ]
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