Technicolor cameras required sets to be heated to 100 degrees to register color
The vivid colors of early Technicolor films required sets to be heated to 100 degrees Fahrenheit to satisfy the extreme light demands of a complex three-strip beam-splitting camera.
Technicolor's 1932 three-strip camera utilized a prism beam-splitter to simultaneously expose three separate black-and-white film records through red, green, and blue filters. Because this process diverted light in three directions and the film stock had an incredibly low speed of ASA 5, sets required massive arc lighting that frequently raised temperatures to 100 degrees Fahrenheit. On the set of 'The Wizard of Oz' in 1939, the heat was so intense that actors often required fans between every take to prevent fainting.
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