Craftsmanship and Differences of Katana Curved

Why are katana swords curved?

This happens during the clay tempered process stage, clay is coated on the sword ridge, when quenching the blade, the part not covered by clay cools faster and becomes very hard, while the sword ridge cools more slowly and remains relatively soft and pliable, the metal blade expands and contracts with heat, so the part not covered with clay will expand more than the spine, causing the katana to bend. In summary, it is the result of differential hardening of the blade during quenching.

The curved curvature of the samurai sword-sori

There are basically three types of sori, the most common one is called Tori sori, the curvature is deepest in the middle of the blade. The sword with the deepest curvature of the tip is called "sakisori", while the sword with the curvature closer to the handle is called "koshisori". It's not that more curvature of the blade is better for cutting, a good curvature is usually between 1/2 to 1", with a maximum curvature of about 1.25" to 1.5". A sword with too much curvature can actually cause the tip to become warped when it touches the target.

The role of the katana curved

1.Helps to enhance the strength of the katana sword and improve the performance of the katana sword

When slashing, the katana with curvature will automatically correct the direction, and the closer the contact point is to the tip, the stronger the force.

2.It is more conducive to quickly pull out the samurai sword

It is necessary to choose an ergonomic samurai sword curvature, so that the inertial effect of swinging the sword makes it easier to circle the blade outward with the body as the axis, and can contact a larger area of ​​the object.

3.Enhance the beauty of the samurai sword

Compared with straight swords with only the tip pointing upwards, the curvature of the katana blade will move in the direction the tip faces, which is more ornamental.