PPG Industries’ aerospace transparencies business and Gentex will be providing electrochromic window systems to Hawker Beechcraft as standard equipment for the manufacturer’s 2010 King Air 350i cabin windows. The PPG-Gentex system–dubbed Alteos–replaces the mechanical shade system, allowing passengers to control the visible-light transmittance of a dimmable panel between the inboard dust cover and outboard, structural cabin window. The dimmable-window panel works by introduction of a mild electrical current. Depending on the strength of the current, the window changes “from a bright, clear state to nearly opaque, or to a comfortable intermediate setting,” according to PPG.