Centering55/45 or better on the front. 70/30 or better on the back.
CornersModerate wear on corners, with fraying & chipping. Noticeable by the naked eye and more pronounced under magnification.
EdgesHeavy chipping and fraying on all edges. Visible wear with minor tears or creases along the edges.
SurfaceExtensive damage including deep creases, heavy scratches/micro-scratches, stains, and surface residue.