2021-07-31
The sharpness of the knife edge is the main factor for the long-term use of the knife. The sharpness is determined by the sharpness and durability of the knife edge. The sharpness of general steel knives can be divided into coarse and smooth. Coarse refers to the small teeth that can be seen under the microscope after opening with a grinding wheel; smooth refers to the cutting edge of natural powder stone grinding the opening, and the cutting edge is particularly smooth. Although the two types of sharpness are different, it is impossible to determine which one is better. The sharpness of the knife edge is determined by the geometric angle of the knife edge, so the geometric angle of the knife edge determines whether the tool is sharp or not.
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