Development of Panchromatic
The introduction of sound to film lead to the replacement of the old noisy carbon lights with tungsten lights, which were much hotter and created a softer light. At the same time the orthochromatic film, which until that time had been used by the industry, was replaced by super-sensitive faster Panchromatic film which noticeably darkened skin colors. These developments required six months of intensive development to create make-up compatible with the new environment. Because they had been designed for black and white film the existing products were unsuitable for everyday use. This new Panchromatic make-up was trademarked in October 1929.
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