Centering65/35 or better on the front. 80/20 or better on the back.
CornersPerfect corners with no signs of wear, nicks, or softening. The corners appear flawless under all forms of inspection and are as sharp as possible.
EdgesPerfect edges under normal inspection. Any tiny imperfections are barely visible under close magnification. Edges are sharp and clean.
SurfaceVery clean surface with no visible scratches or marks under normal inspection. Only tiny imperfections visible under magnification.