Theoretically, composite ceramic molecules laid at thicknesses of 10 to 30 nanometers will emit infrared waves at the most ideal wavelength for keeping food fresh. Currently, industry has attained levels of 70-90 nanometers. The refrigerators employ a coating of this material on aluminum trays to keep fish fresh, and also on a carpet-like material to line the compartments for fruit and vegetables. They are quite effective.
理論上，當陶瓷複合材料的顆粒細微到十至三十奈米時，發射出來的遠紅外線波長最適合用來保鮮，目前東元已經可以做到七十至九十奈米，一方面是在鋁盤上塗裝，用來盛放魚肉，一方面做成一片毯狀織物覆蓋在蔬果箱上，成效相當不錯。