1. Denizli Vocational School of Technical Sciences, Pamukkale University, Denizli, Turkey
2. Department of Leather/Biopolymers, Research Institute of Leather and Plastic Sheeting (FILK), Freiberg, Germany
3. Department of Surface Properties and Tribology, Research Institute of Leather and Plastic Sheeting (FILK), Freiberg, Germany
4. Department of Leather Engineering, Faculty of Engineering, Ege University, Izmir, Turkey