For seventeen years, CBS recorded every broadcast of this series on kinescope film. Many of them were lost to history, however, during two time periods that were far apart. In 1950, CBS saved kinescopes of the first three telecasts at a financial loss to the network. They are available for viewing on a web site. In 1950, the show aired live every other week, not every week. The kinescope process used silver nitrate film, which was flammable. But fire was not the reason why many broadcasts of "What's My Line" were lost during the period of 1950 to 1952. CBS employees discovered an advantage of the expensive silver nitrate film. They learned that it was possible to recover the silver content from the film and sell it. CBS did this many times starting with the fourth show, which the network had aired live on March 16, 1950. Later in the 1950s, safety film replaced silver nitrate for kinescope machines. The movie industry had switched to safety film many years earlier.
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05-03-2025 alle ore 07:57
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