Claim: Continuous Liquid Interface Production begins with a pool of liquid photopolymer resin, part of the pool bottom is transparent and the resin solidifies by ultraviolet light.
Evidence: The continuous process begins with a pool of liquid photopolymer resin. Part of the pool bottom is transparent to ultraviolet light (the "window"). An ultraviolet light beam shines through the window, illuminating the precise cross-section of the object. The light causes the resin to solidify.