About sodium lauryl sulfate
Tribological exams were being carried out employing a ball-on-disc T-eleven tester. The balls were product of metal, whereas the discs had been crafted from metal, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The outline of your system plus the techniques is given in the literature (Szczerek and Tuszyński in TriboTest