The iodide iodate method (also known as Villermaux method) was used to characterize multilamination-type mixers, manufactured at the Institute for Micro Process Engineering of the Forschungszentrum Karlsruhe. Mixing sensitive results were obtained using different reactant concentrations. It is shown that the experimentally obtained data cannot be treated as quantitative data in sense of a "mixing quality." (c) 2008 American Institute of Chemical Engineers.