A new type of wallpaper, which has been developed by scientists from the "institut polytechnique Grenoble INP" and the "Centre Technique du Papier", will go on sale in 2013 after a Finnish firm, Ahlstrom acquired the license.
What looks like a bog standard wallpaper roll actually contains silver particles that allows it to filter out up to three different frequencies simultaneously. It is not the first time that such a technology has surfaced. Back in 2004, BAE Systems was tasked by Ofcom to come up with a similar solution based on what was then called a stealth wallpaper.
It used copper instead of silver and blocked Wi-Fi signals while letting GSM, 4G and emergency calls through. Back then though, a square meter cost £500 whereas the Wi-Fi wallpaper devised by the French researchers should be priced reasonably, with costs matching those of a "classic", mid-range wallpaper according to M. Lemaître-Auger, from Grenoble INP.
The wallpaper is made up of interlocked snow flake-like patterns which can be covered up with any other wallpaper of your choice. And there are even talks of using the technology in floors and ceiling to prevent Wi-Fi signals from leaking through the two remaining sides of any rooms.
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