Or absorbs at visible light frequencies and reflects at lower thermal infrared frequencies. Until the object starts to glow red-hot, it will have low radiative

Or absorbs at visible light frequencies and reflects at lower thermal infrared frequencies. Until the object starts to glow red-hot, it will have low radiative losses. Once it gets that hot--maybe 3000K--it will radiate very well, until cooling enough to radiate mostly at the longer reflective wavelengths.