A method of an embodiment of the invention is disclosed that outputs a first color calibration target using a first color printing technology onto media that has a second color calibration target already output thereon using a second color printing technology. The internal circuit including a CPU, internal devices and a bus line connecting the CPU to the internal devices and extending externally, and the external circuit including external devices provided externally of an externally extending portion of the bus line. A peelable membrane is sealed to the tray flange. The invention also relates to an installation for producing a steel strip of the aforementioned type. The method may further include passing a flowable media containing pollutants andor heavy metals through the foam wherein the pollutants and heavy metals may be removed from the flowable media by the iron oxyhydroxy granules. Each of the blocking devices corresponds to a convection hole and includes two blocking plates and a pushing object.