Fig. (13) The FB and CB surfaces at three different SEM magnifications together with filtered MeX^® images after application of filter with sizes 20%, 10%, and 5% of the horizontal image width. The depth scale of the MeX^® filter images goes from purple which represents the deepest, through blue, green, and yellow up to red which represents the highest points on the surface. The depths are all different in the images. As seen in the filtered images, the fine blasted surface (FB) consists of smaller surface features than the coarse blasted surface (CB).