What was Max Factor's notable contribution to the beauty industry for motion pictures?

Max Factor's notable contribution to the beauty industry for motion pictures was the development of thin grease paint that wouldn't cake. This innovation significantly improved the way actors appeared on screen. Traditional makeup at the time could often appear heavy and caked under the intense lights used in filming, which could detract from the overall look of the performers. By creating a thinner, more manageable grease paint, Factor allowed for a more natural finish that adhered better to the skin and looked vibrant and appealing under the studio lighting. This advancement not only enhanced the visual quality of films but also revolutionized makeup standards for actors, leading to more refined and sophisticated beauty applications in the industry.