Researchers at OWI Science for Fuels gGmbH have identified two real-time measurement methods that are suitable for determining the homogeneity of lubricating greases during their production process. They showed for a lithium soap grease and a urea grease that the methods refractometry and FTIR-ATR spectrometry are suitable for assessing the homogeneity of the thickener structure of these greases that is the state of this structure during the homogenization process.