Archaeological evidence suggests that in the Viking age, bloomery iron was processed further in hearth furnaces to create steel. In this video, Emiliano Carrillo of Sun and Stars Forge demonstrates the process step by step, turning bloomery iron from an earlier Hurstwic iron smelt into steel, suitable for the edges of tools and weapons. http://www.emilianocarrillo.com/ http://www.hurstwic.com/