Katana are historically constructed from a specialized Japanese metal known as tamahagane,[60] and that is developed from a traditional smelting system that results in various, layered steels with different carbon concentrations.[sixty one] This process can help get rid of impurities and also out the carbon written content from the metal. https://japanesekatanahandmadeswo73567.therainblog.com/26192980/an-unbiased-view-of-katana-japanese-sword