Substantive UV-absorbing water-soluble quaternary salts of cinnamidoalkylamine of formula I. The method includes a step of evaluating the level of infrared radiation from the articles coming from the forming cavities so as to adapt the exposure of the sensor in a subsequent step of inspecting the articles in such a manner as to cause the response of the sensor to be uniform regardless of the different cavities from which the articles come. The shifting direction is inverse to a test recording range adding direction in a radius direction of the recording medium. The communication control unit executes the newly requested communication service via a wireless unit having the highest priority among all of usable wireless units.