“…Regarding the calculation of TS MR , it must be acknowledged that the calculation of TS MR could be further advanced by accounting, in addition to a set of mechanical material properties, for other criteria such as parameters reflecting processability of the recycled material (e.g. melt flow index), but also odour and colour, all in function of the envisaged application (Demets et al, 2021;Golkaram et al, 2022). Odour and colour can be a cause for recycled materials not being used in certain products, while they are not an issue for other applications.…”