Recently, someone asked me, “Why did early Techni­color need a special projector?” I was stumped. To my knowledge, early Technicolor films were rendered into a single piece of film that simply ran through any projector that accommodated that size and format. Upon looking it up, however, I learned that the first type of Technicolor introduced in 1916—“Process 1”—actually projected two images, each through its own color filter. A special prismatic beamsplitter recorded two images as adjacent frames on a single reel of film, one through a green filter and the other through a red one.