Story ID: 
PPG Shows Darker Side of Dimmable Window
By: Chad Trautvetter
Caption: Passengers on business jets will be able to block more light coming through electrically dimmable cabin windows with a new dual-panel option from PPG Indus
Word Count: 125
Passengers on business jets will be able to block more light coming through electrically dimmable cabin windows with a new dual-panel option from PPG Industries’ aerospace  transparencies group. The Alteos Interactive Window Systems brand, based  on Gentex electro-chromic technology, allows passengers to  control the amount of light coming through windows, switching from a  bright, clear state to an opaque state and intermediate levels. The  standard system uses dual electro-chromic panels of gel installed  between the inboard dust cover and the outboard structural cabin window. The amount of electrical current passing through the panels  determines their level of clarity. The original Alteos system is  certified on the Hawker Beechcraft King Air 350i, and Boeing has  selected the system for its new 787 Dreamliner.