Product Parameter:
Package Include: 1 sword + 1 Box + 1 bag + 1 stand
Craft: Hadori-polishing, Clay tempered, Quenching, etc.
Handle: synthetic silk ito + Real rayskin + High grade Brass fittings plated with real gold/silver
Saya: Black lacquered wood saya + Red rayskin
Koiguchi & Koijiri & kurigata: High grade black real OX Horn
Overall Length: 103cm/40.6"
Blade Length: 70cm/27.5''
Handle Length: 26cm/10.24''
Blade Widdth: 3.2cm/1.26''
Thickness: 0.7cm/0.28''
Bo-hi(blood groove): No
Hamon: Handmade real hamon
Hardness(HRC): 60
The Modern Style Polishing (Hadori Style Polishing 刃取)
It is designed to highlight the aesthetics of the blade. In this style polishing, the hamon appears white against the black, shining steel and the mirror finished shinogi-ji. It is so aesthetic that it makes a blade perfect for display.
The white pattern that looks like hamon is called "HADORI". It is not a true hamon, but it is designed by polisher along the hamon to exaggerate it. When you look at the blade under a proper light, you can see the true hamon under the hadori.
With the modern polishing style, you can see the blades with aesthetically "made-up face".This polishing style was developed by a famous polisher in the early 20th century. This step is very time-consuming. The swordsman even had to polish the blade carefully for nearly a month.
To maximize both the cutting edge and the resilience of the sword spine, a technique of differential heat-treatment is used.The sword is painted with layers of clay before heating, providing a thin layer or none at all on the edge of the sword, ensuring quick cooling to maximize the hardening for the edge. A thicker layer of clay is applied to the rest of the blade, causing slower cooling. This creates softer, more resilient steel, allowing the blade to absorb shock without breaking.
About T10 carbon steel:
The best quality of high carbon steel is T10, the carbon content was 1.03%, and the element contains a small amount of chromium, molybdenum, vanadium, after heat treatment can reach HRc 58-60 hardness. Toughness is very good, but it is not resistant to rust. It is applied to traditional european-style hunting knife, large cutting knife and military dao.
