The process begins at room temperature. Copper sheet stock (0.5–1mm thick) is layered between sheets of stainless and brass in a precise sequence. The stack is assembled cold, then the edges are sealed shut by forge-tacking before any heat is applied. This sealing step is not optional: copper liquefies before steel reaches forge-weld temperature, and an unsealed billet loses it on first heat. The sealed stack enters the forge and is brought to approximately 1050°C, the narrow window where steel becomes plastic enough to weld, while copper remains just below its melting point of 1085°C. At that temperature, a hydraulic press drives the layers into permanent metallurgical contact. The billet is then drawn out, manipulated into pattern, and prepared to receive the core. The high-carbon steel core (12Cr18MoV in both FireForge series) is inserted at the centre of the Cu-Mai cladding and forge-welded into final structure. The core is never folded or pattern-welded. It enters clean, centred, and intact. Its position determines where the cutting edge will be. Heat treatment is applied to the core alone. The cladding metals (stainless, copper, brass) do not harden. They are structural. They protect and carry. The core reaches its target hardness independently. A controlled ferric chloride etch is applied to the finished blade surface. Each metal responds differently: stainless steel oxidises dark, copper as warm tone, brass as gold. The pattern that emerges is the direct record of how these metals are arranged through the cross-section of the blade. It is not designed. It is not applied. It is revealed, and it cannot be produced twice.