In comparison to our achievement of complete PA 6 dissolution after 72 h, Rietzler et al. ( ) investigating PA 6.6 textile fibers and Qianhui et al. ( ) investigating PA 6 textile fibers, reported complete dissolution in 2 hours or less. This can likely be explained by considering the filament diameter differing two orders of magnitude from several µm (textile fibers) to 1.75 mm (bulk, in our study) and including that the CEW has to penetrate into the PA 6 bulk from the outside inwards requiring more time to fully dissolve larger parts.