Copper Damascus (Cu-Mai)

Copper Damascus, also known as Coppermascus or Cu-Mai, is a form of patterned steel that combines layers of pure copper with steel to produce striking visual effects, often used in high-end and artistic knife making. The technique involves stacking alternating layers of copper and steel, then forging them together—typically below copper’s melting point (around $1984^{\circ}F$) to prevent overheating. This delicate process demands precise temperature control, and some makers opt for braze welding instead of traditional forge welding when bonding the copper. The result is a blade with captivating contrast and intricate patterns, though the inclusion of soft copper can impact the blade’s durability and cutting performance if not managed carefully, as noted by experienced makers online.

Core Steel: 9cr18mov

Handle Material: Rosewood

Weight 200g

Full Length 415mm

Blade Length 270mm

Handle Length 125mm

Blade Tall 35mm

Spine Thickness 2 mm

Hardness 58 HRC _+

First Rui Slicing knife, Ray's favourite so far.

**Disclaimer – Cu-Mai (Copper Composite) Kitchen Knives**

Our Cu-Mai knives are crafted using a layered construction that includes copper between layers of stainless or high-carbon steel. The copper layer is primarily decorative and structural—it is **not intended for direct contact with food** during normal use.

While copper is a beautiful and functional metal, it can react with acidic foods (such as citrus, tomatoes, and vinegar), potentially causing discoloration or a metallic taste if prolonged contact occurs. For this reason:

- These knives should be used for cutting and preparation only, **not for long-term food storage or marination**.

- Always **rinse and dry the blade promptly** after use, especially when cutting acidic ingredients.

- Avoid leaving the knife in contact with moisture or food residue for extended periods.

- Regular maintenance and cleaning will preserve the protective finish and ensure safe use.

By purchasing this knife, the buyer acknowledges understanding of these characteristics and agrees to follow proper use and care practices. The seller is not responsible for misuse, improper maintenance, or chemical reactions resulting from direct and prolonged food contact with exposed copper areas.