Mobile phone and wifi: the waves have invaded our daily lives. To put an end to cell phones that ring during class hours or to protect private Wi-Fi networks, Japanese researchers from the University of Tokyo recently presented a painting capable of absorbing waves from electronic devices. Still in the prototype state, this coating based on aluminum oxide-iron is not content to return the waves as some current coatings can do but absorb them. Relatively affordable, this paint should be sold at around eleven euros per liter. An effective solution to put an end to the fears linked to mobile phones and cleverly protect your wifi network.