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Affinity Co.: New window glass stops rooms from heating up

Japanese glassmaker Affinity Co. has begun marketing a type of energy-saving window glass that turns opaque when it heats up from sunlight, preventing rooms from warming up. The company is promoting t…

Japanese glassmaker Affinity Co. has begun marketing a type of energy-saving window glass that turns opaque when it heats up from sunlight, preventing rooms from warming up. The company is promoting the glass for a wide range of applications, including in homes, offices, schools and hospitals. The glass is made from two panes sandwiching a thin layer of gel. When the gel reaches a certain temperature, the molecules aggregate and it turns opaque, blocking out around 80% of sunlight. The gel can be adjusted to turn opaque when it heats up to between normal room temperature and 60C. The glass itself can be made in sizes up to 1 x 2 m., and utilizes the same window frames and installation procedures as normal window glass.

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