B. R. Wulff
When evaluating the performance of detergent formulations for automated cleaning applications, many different aspects have to be considered, which can be objectified to varying degrees. For example, while numerous methods are available for evaluating cleaning performance on a laboratory scale or in machine application, evaluating the performance of rinse aids is a much greater challenge. This is usually done by relying on a more or less subjective visual assessment of testing conducted in a dishwasher. Especially during formulation development, the developer often lacks a tool that allows a quick comparison of different formulations or makes it possible to check the success of modifications without the need for elaborate machine testing. The laboratory method presented here allows the comparison of rinse aids with regard to their flow-off behaviour under different application conditions with very little expenditure of time and resources.