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2. Smart glass - Wikipedia

   en.wikipedia.org/wiki/Smart_glass

   Smart glass, also known as switchable glass, dynamic glass, and smart-tinting glass, is a type of glass that can change its optical properties, becoming opaque or tinted, in response to electrical or thermal signals.

3. Factory tint - Wikipedia

   en.wikipedia.org/wiki/Factory_tint

   Unlike window film, privacy glass is a pigment within the glass that is installed during the manufacturing process. There is no way to remove the tint from the glass except to replace the glass with untinted glass. The only alternative to getting the same benefits of window film is to install window film over the factory tint.

4. Window film - Wikipedia

   en.wikipedia.org/wiki/Window_film

   The thicker window films known as safety and security window film are designed to perform under extreme conditions, and as such there are specific standard criteria these films should meet, such as American standards ANSI Z.97, CPSC 16 CFR 1201, Cat II (400 ft-lb), and the British Standards BS 6206 (Class A, B, C).

5. Electrochromic device - Wikipedia

   en.wikipedia.org/wiki/Electrochromic_device

   In the 1930s, Kobosew and Nekrassow first noted electrochemical coloration in bulk tungsten oxide. While working at Balzers in Lichtenstein, T. Kraus provided a detailed description of the electrochemical coloration in a thin film of tungsten trioxide (WO 3) on 30 July 1953. In 1969, S. K. Deb demonstrated electrochromic coloration in WO 3 thin ...

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

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