Starphire Ultra-Clear glass by Vitro Architectural Glass (formerly PPG glass) is 87 percent less green than ordinary clear glass and offers pure, undistorted transmitted color with no grays or yellows. With its signature azure blue edge, Starphire glass maintains its clarity and true color transmittance at thicknesses up to 19 millimeters (¾ inch), according to company officials. Express colors and patterns in their purest forms. Evoke luxury on doors, shower enclosures and more. Even in heavy thicknesses, Starphire glass transmits 90 percent of available visible light