Microscope glass slides. The high quality of manufacturing ensures excellent clarity and brightness. Cover slips or protective covers are thin, square glass pieces placed over the sample on microscope slides. They are used to flatten the sample for better study, keep liquid samples on the slides, and protect them from potential external contamination. The special surface treatment with silane coating creates permanent free polar bonds on the surface, which also ensures cell and tissue adhesion through electrostatic attraction and supports the formation of covalent bonds between the tissue and the glass surface. Tissue and cell substrates adhere quickly and without the use of additional adhesives or protein coating agents. This saves costly and time-consuming preparation techniques. The microscope slides do not show streaks and bothersome background coloration, such as the blue or red background obtained with hematoxylin and eosin staining in tissues on albumin-coated slides, or the brown background obtained during the immunoperoxidase procedure. During these procedures, they allow for stronger enzyme-induction without tissue loss.