The static and dynamic characteristics of a buffer were examined in order to estimate the ability of a sorbent to buffer changes in RH within a showcase. The moisture content, hysteresis and response time of three sorbents, a regular density silica gel, an intermediate density silica gel, and Nikkapellet were examined. The delaying effect of hysteresis on reponse time was demonstrated. The importance of a sorbent's physical characteristics and temperature dependence were discussed. Methods for improving response time by using a fan to aid circulation, improving the distribution of the sorbent, and by the use of silica gel powder were tested.