MATÉRIAU D'EMBALLAGE, PROCÉDÉ DE PRODUCTION DE MATÉRIAU D'EMBALLAGE, DISPOSITIF DE LECTURE, SYSTÈME DE GESTION D'ARTICLE STOCKÉ, DISPOSITIF DE DÉTECTION DE DÉCONNEXION, ÉTIQUETTE DE DÉTECTION D'OUVERTURE ET SYSTÈME DE DÉTECTION D'OUVERTURE
A package in an aspect of the present invention includes: a package body having a receiving cavity for receiving a cavity item; a sheet for sealing the receiving cavity; a conducting wire formed on the sheet so as to pass above the sealed opening portion of the receiving cavity; and a wireless communication device formed on the sheet so as to be connected to the conducting wire. The wireless communication device transmits a signal including information which differs between before and after the conducting wire together with the sheet is cut as a result of opening the receiving cavity. The information transmitted from the wireless communication device is read by a reader. The package and the reader are used for a cavity item management system.