The reactions were carried out with a milling duration of 170 min and an acid content of 6 %. In the following Figure three overlayed HPLC-chromatograms of the soluble products that show identical profiles are shown as well as the amount of soluble products. The results are in good agreement to each other and lead to a soluble product fraction of (26.5±1.9) %. These reproducibility experiments show that the mechanocatalytic partial depolymerization is a reliable and robust method.