Solar Control Glass
PPG Industries now offers Optigray glass, an ultra-neutral, warm-light-gray glass designed to maximize light transmittance and clarity and to work with Solarban-coated, solar-control and low-emissivity (low-e) glasses to enhance solar control performance. The glass offers an extremely light gray tint that eliminates the green naturally present in conventional clear glass formulations. The glass is designed to function as a substrate for solar-control and low-e coatings, such as those on Solarban 60, Solarban 70XL, Solarban 67 and Solarban R100 glasses. In a standard 1-inch insulating glass unit, Solarban 60 Optigray glass has visible light transmittance of 50 percent and a solar heat gain coefficient of 0.30, which yields a light-to-solar-gain ratio of 1.67.