Metal free polymer tanning agent
ProWhite PL is developed for metal free tanning systems and recommended as a pretanning agent. It lowers down the total amount of the other tannins necessary, for instance, syntans, vegetable extracts or mineral tanning agents. ProWhite PL allows a high stitch and tear strength and heat resistance at the end of post-tanning processes. ProWhite PL gives a white crust that also yields a homogeneous and standard pastel or bright colour tones in dyeing.