Originally Posted by
Undream
To me, this simply looks like a terribly uneven grind, which is common on lower quality current production blades -- I see no signs of a warp, and I see no signs of a frown -- he simply was forced to hone through the center portion of the blade which was not ground as hollow as the rest of the blade (heel/point).. It looks like heavy pressure on the hone in the center, but if that was the case his improper technique would be seen on the pile side. It is more likely that the heel/point simply were not making contact because of the abundance of metal throughout the center of the blade that was never properly ground out...