Tribological checks were being performed employing a ball-on-disc T-eleven tester. The balls had been product of steel, While the discs have been product of steel, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The description of the unit along with the techniques is provided from the literature (Szczerek and Tuszyński https://anioniccationic77365.blogunteer.com/31172059/a-secret-weapon-for-anionic-and-cationic