The packing case specification used at the Tate Gallery for paintings has not changed for several years. The many paintings loaned in packing cases fabricated to this specification appear to have been successfully protected as very few noticeable damages have occurred. An example of a typical packing case was therefore evaluated in a series of tests. An indication was obtained for the degree of vibration and shock that the paintings appear to have withstood. A temperature change halftime was determined and data were obtained relating relative humidity (RH) fluctuation and temperature change within the case. The results are reported in this paper.