The unit for the hardness is Shore A. This is not uncontroversial. The relative error in the used lower range is very high and the measuring minimum rather amounts to 10 Shore A. But for some printing problems, like for example the printing of glass, the utilization of very soft printing pads is necessary. Because of the fact that here a classification in Shore A is no longer possible, you have to change to Shore 00, which is qualified as essentially softer. A very soft printing pad has a hardness of 35 Shore 00.