In the injection molding method, the stamping press is built into the injection mold of the machine, and the embossed information of the nut (see glass master) in liquid Pollycarbonat. After cooling, the disc is coated with aluminum, and sealed by a UV lacquer. The CD is then finished and ready to play. Of course, the CD either screen or offset printing is still being printed. The procedure is the same for a DVD or Blu -ray.