Given that radioactivity was discovered by Henri Becquerel when he noticed that Uranium salts were fogging his photographic plates, you’d think the film makers would have thought of this problem ahead of time.
Lead Shields Protect Men Filming Radium Story
DURING the filming of a motion picture dramatizing the use of radium, elaborate precautions were observed to protect workers from the element’s radiations. The cameraman operated behind a lead shield featuring a glass panel, while a workman who handled the radium used flexible gauntlets of fabricated lead and wool which were attached to a special observation shield of lead and glass.
Production was almost halted when the camera film became cloudy and diffused through exposure to the radium radiations but technicians were able to develop a film suitable for the job.