This product uses a technique known as black dyeing to achieve its color. Black dyeing involves immersing the stainless steel in a sodium hydroxide solution, which initiates an oxidation reaction that turns the metal black. By intentionally causing a chemical reaction to establish a layer of black rust, this technique helps prevent red rust, which is a common enemy of metals, and provides protection against corrosion. Tableware and cutlery can develop scratches and lose their finish over years of use. However, Kuro cutlery features a dyeing process rather than a coating. This means that scratches will become part of the aging process, allowing you to enjoy the character and depth that develop over time. This unique aspect offers the benefit of a more authentic and rich experience as the cutlery ages. -Country of Origin/Manufacturing: Japan -Material: Stainless steel -Size: Length 130mm, Weight Approx. 13g -Dishwasher Safe