Creating Crucible Steel

Frank was in the middle of his father's workshop, where he gazed upon the middle-aged man as he pulled out a crucible with a wide smile on his face. The man was a handyman by trade, working his way up the latter as a contractor, until the point where he now owned his own business. He made a decent living, at least enough to provide for his family. 

However, it was just his skills as a contractor. Marco enjoyed doing all kinds of DIY projects at home. Among them was the smithing of knives. However, he was a stubborn old bastard, and had built his own blacksmithing workshop from scratch. Naturally, he made use of his teenage son to help him with his projects. 

Recently the two of them had finished his crucible furnace, which was how Marco planned to make his own steel. At the moment, he was lecturing his boy on the process behind this. At the moment he was filling a crucible full of pig iron about three-fourths full, where the rest was filled with charcoal.