The invention relates to a process for producing a shaped body from metal foam, including the following steps:. For this purpose, a mask of a predetermined size is structured as a thinning pattern in which data are arranged randomly, the data being for determining whether or not the respective ink ejection openings in a printing head are to be driven when the printing head repeats the scan a plurality of times in the same printing area of a printing medium. In one example, copper is removed from the scribe area by wet etching the wafer. The filler rods and filler tubes are made of a solid or porous or foam-type material expanding in the presence of water.