This invention relates to novel hygienic-therapeutic or personal care devices that are based upon intense far-infrared sources in which radiation is generated by novel conductive materials. The conductive materials are specially designed and made to radiate ten to thousands times more intense far-infrared radiation than typical conductive materials, and such strong far-infrared radiation is achieved with high, typically greater than 90%, conversion efficiency of energy to radiation. The radiation properties of the proposed conductive materials do not follow the Wiens law (“black body” law). The devices are intended to be used in therapy, medicine, cosmetic technology, hygiene technology, or household use.
