In the blink of an eye, a few days passed. Li Qing hammered the forged sword blank until it was smooth and even, and the shape of a sword could already be seen.
After being hammered at high temperatures for so long, the entire Ink Gold longsword had become scorching hot, just reaching the point where it could be quenched.
It was worth mentioning that there were two quenching methods. One was the most common water-quenching method, while the other was the less common oil-quenching method.
The former cooled faster, but it required repeated heating and repeated quenching in order to improve the weapon's rigidity.
However, considering how difficult Ink Gold was to heat, Li Qing chose the oil-quenching method, allowing him to complete the quenching of the entire Ink Gold longsword in one go.
He picked up the tongs and clamped the Ink Gold sword, which had been heated through once more in the furnace, then slowly immersed one edge into the cold oil he had prepared beforehand.
Sizzle!
The moment it touched the surface, the oil temperature began to rise slowly, bubbles rolling up one after another.
Unlike water quenching, oil quenching produced no billowing white vapor. There were only bubbles gurgling continuously to the surface.
After waiting a brief moment, Li Qing lifted the Ink Gold sword again and began quenching the sharp edge on the other side.
Oil quenching required patience, because the cooling process was comparatively slow, and the blade surfaces had to be repeatedly immersed.
After soaking it again and again, when the sharp edges on both sides of the Ink Gold sword gradually cooled, fine rings of wave-like patterns emerged.
This was the unique effect produced when Ink Gold cooled in oil. Every ring of wave patterns represented one quenching.
Li Qing was