There is provided, according to the present invention, a reproducing device capable of preventing illegal duplication and reproduction, as well as of reproducing content without degrading the quality of the audio and visual contents. The polymer of the present invention is a blend of high crystalline polypropylene homopolymer and a high ethylene ethylenepropylene random copolymer. In preferred implementations, the light treatment is a pulsed light treatment and the product is a biological fluid product flowed through a treatment chamber.