Internship opportunity at LGP2 - Jan/Feb-July. 2026 - Paper and cardboard recycling has made great progress in recent decades. However, conventional processes cannot recycle more than 90% of the material. It is generally considered that cellulosic fibers cannot be recycled more than seven times, partly due to the hornification phenomenon, which damages the fiber structure. The growing demand for recycled fibers leads to the use of increasingly low-quality recovered paper and cardboard. To compensate for this quality loss, paper mills are currently adding starch and/or virgin fibers. The mission is to avoid these additions by enhancing the bonding potential of fibers through chemical processes.