Free Shipping
Supports worldwide free shipping
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...