Originally Posted by dakine
That wavy edge is what makes the difference between a hand tune and some of the structured edges found at the highest levels.
I believe there is a difference because racers end up with what's fastest and a world class tech knows something about the edge structure necessary for best performance in different circumstances.
That said, it is hard to beat an edge honed to perfection by someone with time on their hands and a 1500 grit diamond stone.
Now if you want really sharp, a fractured edge is the way to go.
A fractured edge like the kind a caveman made by chipping obsidian is atomically sharp.
The finest microtomes use tools made from fractured diamond to really slice thin.
Yes, I am a curmudgeon! I am sure you saw my video where I supposed the structure in the machined edge might be seen the same way as structure in a ski base. How it created a serrated edge.
It may be that some of the inferior machines create too much wave though. I don't think a ice skate would track or glide well with a wavy edge though. An Ice skate blade may be like that razor at 5000x you showed, but I bet it's not to wavy in it's length. Therefore I see a ski edge the same way. I want it as true as possible in its length. Small chips in that edge may act as serrations, yet the edge is still very true in its length.
And so true of obsidian. I live minutes from the Big Obsidian Flow at Newberry Volcanic Monument. The info there shows microscopically how obsidian fractures to create an edge sharper than anything man made. It has been used in surgical procedures to make the finest cuts the heal much faster that a steel scalpel.
When I really go to town on an edge I will use ceramic stones after the 1500 diamond and or other polishing stones. After lots of work with the ceramics the edge is much finer than the 1500 diamond stones. This takes a lot of time so I don't do all the time. If one spends a lot of time with the ceramics the edge will get a bit harder at the surface and the edge will last longer. Not as hard as the fast spinning stones that make heat though.
Edit. BTW true race skis have very thin edges, so I don't see much advantage to a structure in them. It is said steel is slow and base is fast. Super thin edges are faster on edge it is said, so maybe the thinner they get the better.
Here's to you Dakine!