Examples of data from International Atomic Energy Agency (IAEA) leach tests on spent fuel elements are shown that were displayed, not in the recommended manner in the IAEA leach test, but in the manner of the modifications of this leach test. The main difference in the display methods is in the plotting of incremental leach rates as a function of cumulative time of leaching rather than as a function of the mean time of leaching of each individual sample. This difference in display can lead to wrong conclusions if the display methods are not carefully considered.