How can you tell if a knife is open-edged? What does it mean to have an open edge?

Open edge: when a knife is burnished, the surface of ? Iron or ? steel will be ? oxidize or contain ? high carbon content and will become brittle. The proverbial opening of the edge is to grind these away at the point of the blade, leaving the steel part exposed so that it will be sharper. There are hand and machine sharpening methods, with hand sharpening being sharper.

To determine whether a knife is open edge to look at its edge, if the blade of the line vaguely, if not, that is open edge; if you can clearly see a bright line, that is not open edge. The easiest way is to take a piece of cotton cloth, gently pulled over the edge, sharp or not, a test will know.

The way to recognize a sword is good or bad;

1) After pulling out the sword, first look at the edge of the surface there is no embroidery corrosion.

2)See if its pattern is clear and smooth.

3)First look at the two sides of the blade surface is absolutely symmetrical;

4)Whether the spine of the sword is a straight line;

5)Then look at the blade of the knife, the tip of the blade and other parts of the chipping, flat.

6)Finally, look at the open edge, whether it is flat and the average width of the open edge is consistent.

7)Check whether the parts of the accessories are solid, whether there have been traces of replacement