The invention relates to a method for sealing at least a packaging unit by means of a sealing tool lower part carrying the packaging unit, a sealing tool upper part, and a sealing plate. The basic body 1 consists of a transparent plastic and the decoration 4 is applied with its visible side 5 to the surface 2 of the basic body 1. A vector storage element comprising k cells can store an k electrical quantities corresponding to a codeword. Electrochemical drilling is achieved when a current is passed to the foil or portion of the foil sheet in solution. When the article of manufacture is used to analyze a liquid sample such as blood, less sample is required because of the preferential migration in the sonically treated sintered polymer.