The purpose of decatizing is to deluster (when necessary) the fabric, to fix it so that it does not deform in use and finally to increase its softness by making it swell. In this process, the fabric is wrapped around the large cylinder. Each layer of fabric is separated by a layer of fleece which is unwound from the roll below. The steam exits through the perforations. At the end of the process, the machine is turned upside down and the fabric is put back on.