The relative humidity of the ambient air and the temperature are the most important influencing factors for a more accurate statement of the water absorption capacity. The ability of silica gel to store water depends on the isotherm. This means that the absorption capacity is influenced by the relative humidity. For example, the silica gel can absorb up to 40% water if the ambient air has a humidity of 100% RH. If this value decreases, the water absorption capacity also decreases. For example, at 60% RH this is only max. 30% of the dry weight, etc.