Peeling treatment. Normal skin is smooth extruded sheet, the epidermis surface mortar and adhesives and adhesion can be poor. On the one hand make the surface rough paste uniformly favorable, with adhesives and surface mortar tensile bond strength, water resistance and resistance to freeze-thaw strength were 0.25MPa or more, greatly improves the system's cohesion, increased reliability. On the other hand by peeling the release handle a certain amount of uniform internal stress.