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A curtain is a piece of cloth or other material intended to block or obscure light, air drafts, or (in the case of a shower curtain) water. [1] A curtain is also the movable screen or drape in a theatre that separates the stage from the auditorium or that serves as a backdrop/background.
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.
The safety curtain or fire curtain is used to separate the stage from the audience in case of a fire onstage. It may be made of heavy fireproofed fabric or solid steel sheet. Some were made of asbestos cloth. After several deadly theater fires in the early 1900s, safety systems were developed to isolate the stage, direct smoke away from the ...
Smart glass, also known as switchable glass, dynamic glass, and smart-tinting glass, is a type of glass that can change its optical properties, becoming opaque or tinted, in response to electrical or thermal signals.
A typical installation of insulated glass windows with uPVC frames. Possibly the earliest use of double glazing was in Siberia, where it was observed by Henry Seebohm in 1877 as an established necessity in the Yeniseysk area where the bitterly cold winter temperatures regularly fall below -50° C, indicating how the concept may have started: [2]
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