The problem of the invention is to so develop known dispensers, that it is possible to very precisely determine the actual discharged medium volume. The ceramic sheet product includes a binder layer formed of a binder resin; and a ceramic green sheet form on the binder layer. The wall has a plurality of openings defined therein. The group is provided in the group calendar interface. If the two do not agree, then unprocessed image data within the same file is subjected to image processing in accordance with the set parameter and the processed image is displayed.