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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.
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 ...
Thermal or blackout curtains use very tightly woven fabric, usually in multiple layers. They not only block out the light, but can also serve as an acoustic or thermal dampener. Curtain liners are used to protect actual curtains from getting wet. Eyelet Curtains are attached to a pole (usually metal). A number of circular holes are cut into ...
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.
Points are short black lines woven into the selvage of the blanket along the edge just above the bottom set of stripes. About 4 inches (10 cm) in length (except in the case of half points, which are 2 in [5.1 cm]), they indicate the finished overall size (area) of a blanket and allow easy determination of the size of a blanket – even when folded.
Special blankets known as baby blankets are used to protect infants from the cold. Small children (and some adults) may also use a blanket as a comfort object. [12] Blankets may be spread on the ground for a picnic or where people want to sit in a grassy or muddy area without soiling their clothing. Temporary blankets have been designed for ...