Kitsune then took the tamahagane and nabegane are repeated the process of forging in alternating layers. This process, known as age-kitae, forge welded both the tamahagane and nabegane into a single block that was elongated, cut, folded and forge welded again into its originally shape. The songsteel itself was folded numerous times, forming millions of subatomic layers of songsteel and making the songsteel almost homogenous. This process was repeated to form numerous blocks of hard steel for edges, hagane, and slightly less hardenable spring steel, kawagane, which would then later be forged into a singular blade.
The entire forging process was also facilitated by a highly reducing environment caused by a mixture of chemicals coated on the songsteel block between each heating and folding. These chemicals promoted the formation of a wustite layer, which would then react to form pure fayalite in the reducing environment. The fayalite would act as a flux, attracting impurities as it is squeezed from between the layers. This would leave the surface of the songsteel pure, which would facilitate the forge-weilding process as a whole. This would reduce the kera to ninety percent of its initial weight due to the loss of such impurities.
The forging process itself would create alternating layers of differing hardenabilities, allowing for the perfect balance between the hardness of high carbon songsteel and the ductility of low carbon songsteel to form the property of toughness. Furthermore, any voids would be eliminated and the homogenizing of the metal was so superb that the effective strength of the blade would be flawless, lacking any potential weak points and shatterpoints in the blade.