01-14-2021, 05:06 PM
Another great video Mr. Brian!
It clearly demonstrates that, for most general purpose knives like cutlery, toothy edges cut but a polished edge can just slide on the surface. Anyone who has cut tomatoes has probably experienced how frustrating it is when the blade just slides on the skin.
Below are some microscope images I took of blades I sharpened. It’s easy to see why a polished edge can slide on a surface while a toothy edge acts like a tiny saw blade and cuts.
It clearly demonstrates that, for most general purpose knives like cutlery, toothy edges cut but a polished edge can just slide on the surface. Anyone who has cut tomatoes has probably experienced how frustrating it is when the blade just slides on the skin.
Below are some microscope images I took of blades I sharpened. It’s easy to see why a polished edge can slide on a surface while a toothy edge acts like a tiny saw blade and cuts.