Guy Eymin Petot Tourtollet's Wi-Fi-Blocking Wallpaper

Wallpaper That Protects Your Data
Photograph by Akatre for Bloomberg Businessweek

Forget those prim Laura Ashley floral patterns and opulent Louis XIV-style designs: Wallpaper’s no longer just about room atmospherics. High-tech versions emit light, purify the air, and even keep buildings from crumbling in bomb attacks. Now Guy Eymin Petot Tourtollet, 46, scientific director of the French pulp and paper research institute Centre Technique du Papier, has invented a snowflake-patterned wallpaper that blocks Wi-Fi signals, while still allowing FM radio and emergency frequencies to pass through.

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