The aim of the presented trials is to quantify the delabelling performance by using sensor-based material. ow monitoring (SBMM). To evaluate the usability of SBMM for that task, the material was analysed before and after the delabelling process for every batch of samples both with an NIR sensor and by manual sorting. The samples were taken from plants in Belgium and Germany, to create a variety of labelled PPW-objects. The examined objects have been covered with di ႇ erent types (eg, full sleeve, half sleeve, adhesive labels) and materials (mono-or multilayered plastics). Based on the results of these trials regarding fullsleeve PET-bottles, sensor-based quality control (SBQC) could further be developed and then implemented in a sorting plant after a delabelling process, to ensure the delabelling performance and thus enhance the success of the following sensor-based sorting steps.